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Icapiro ryo Kohereza Amazi (WTP)
IMD/INS/OMD/TOM Shyiramo Imitako y'Ibihumyo

Icapiro ryo Kohereza Amazi (WTP)

Ikoranabuhanga ryo gushushanya ubuso bwo gucapa amazi, rizwi kandi nka ikoranabuhanga ryo gucapa amazi n'ikoranabuhanga ryo gucapa amazi, ni ikoranabuhanga ryo gushushanya ricapa imiterere ku buso bw'ibintu. Rikora mu gushyira agapapuro kabigenewe ko kohereza amazi mu mazi hanyuma rigashyira imiterere ku buso bw'ikintu.

Intambwe zo gucapa amazi ni izi zikurikira:

Uburyo bwo gutegura: Hitamo agapira n'agapira byo kohereza amazi bikwiye, sukura kandi utunganye ubuso bw'agapira kugira ngo urebe ko agapira gashobora gufatana n'agapira.

Shyiraho primer: Shyiraho urwego rwa primer ku buso bwa substrate kugira ngo wongere gufatana kwa firime no kugira ngo ishusho igaragare neza.

Shyiramo amazi: Shyira agakoresho ko kohereza amazi mu mazi hanyuma utegereze ko agakoresho gakura neza maze gakore igishushanyo mbonera girambuye.

Igikoresho cyo gusiga: Shyira urwego rwa activator ku buso bw'urukiramende kugira ngo wongere imikoranire n'ubufatanye hagati y'urukiramende n'amazi.

Kwimura: Shyira buhoro buhoro substrate mu mazi ku buryo igishushanyo kiri kuri firime gihuye n'ubuso bw'substrate, hanyuma ukure substrate mu mazi

Gusukura no kumisha: Sukura ubuso bw'ubutaka n'amazi meza kugira ngo ukureho agahu gasigaye n'ikintu gitera imbaraga, hanyuma wumishe ubutaka.

Gushyiramo irangi no gukonjesha: Uko bikenewe, irangi rishobora gukonjeshwa no gukonjeshwa kugira ngo ryongere ububengerane n'ubudahangarwa bw'ubuso.

IBIKORESHO

  • Uburyo bwo gucapa amazi bushobora gukoreshwa ku bikoresho n'ibicuruzwa bitandukanye, nk'ibice by'imodoka, ibikoresho byo mu nzu, ibikoresho by'ikoranabuhanga, ibikinisho, nibindi. Bushobora kugera ku miterere n'ingaruka zitandukanye, nk'ingano y'ibiti, imbuto za marble, imbuto za fibre ya karuboni, nibindi, bigatuma ubuso bw'ibicuruzwa burushaho kuba bwiza kandi budasanzwe. Muri icyo gihe, uburyo bwo gucapa amazi bufite ibyiza byo kugabanuka, koroshye gukoresha, no gukoresha mu buryo bugari, bityo bukaba bwarakoreshejwe cyane mu nganda zo gushushanya.
    Icapiro ryo kohereza amazi (WTP) rinazwi kandi nk'icapiro ryo kohereza amazi, icapiro ryo kwibiza mu mazi, icapiro rya cubic, icupa ry'amazi, cyangwa icupa ry'amazi. Filimi ya WTP ishobora gushonga mu mazi no kwimura igishushanyo ku buso bw'ibicuruzwa. Bitandukanye n'uburyo gakondo bukoreshwa gusa ku buso burambuye cyangwa ibikoresho bifite ubuso buto bugoramye, ikoranabuhanga ryo kohereza amazi rishobora gukoreshwa ku buryo butandukanye bwo gutunganya ubuso, cyane cyane ku buso butaringaniye n'ibikoresho bitandukanye, nk'ibicuruzwa bya pulasitiki, ikirahure, ibiti bikomeye, amabuye, fiberglass, ceramic, icyuma, nibindi.
    Uburyo bwo gushushanya ubuso bwo kohereza amazi ni ikoranabuhanga ryo gushushanya imiterere ku buso bw'ibintu. Mu gushyira agapapuro kabigenewe ko kohereza amazi mu mazi, imiterere yoherezwa ku buso bw'ikintu. Ifite ibi bikurikira:
    Ubudasa: Uburyo bwo kohereza amazi mu icapiro bushobora kugera ku miterere n'ingaruka zitandukanye, nk'ingano y'ibiti, imbuto za marble, imbuto za fibre ya karuboni, n'ibindi, bigatuma ubuso bw'igicuruzwa burushaho kuba bwiza kandi budasanzwe.
    Koroshya: Uburyo bwo gucapa amazi bukwiriye ibikoresho n'ibindi bikoresho bitandukanye, nk'ibice by'imodoka, ibikoresho byo mu nzu, ibikoresho by'ikoranabuhanga, ibikinisho, nibindi, kandi bushobora gushushanya ibintu bifite ibikoresho n'imiterere itandukanye.
    Igiciro gito: Ugereranyije n'izindi nzira zo gushariza ubuso, inzira yo gucapa amazi ifite ikiguzi gito kandi ikwiriye gukorwa ku bwinshi no gukorwa ku bwinshi.
    Imikorere yoroshye: Imikorere yo gucapa amazi yo kohereza iragoye cyane. Ukeneye gusa gutegura filime n'icyuma gicapa amazi yo kohereza no gukurikiza intambwe zimwe na zimwe. Ikoranabuhanga ryo gucapa amazi yo kohereza rikoreshwa cyane muri izi nzego zikurikira:
    Inganda z'imodoka: Uburyo bwo gucapa amazi bushobora gukoreshwa mu gushushanya ibice by'imbere by'imodoka, ibice byo hanze, amapine n'ibindi bice, bigatuma imodoka igaragara neza kandi igezweho.
    Inganda zikora ibikoresho byo mu nzu: Uburyo bwo gucapa amazi bushobora gukoreshwa mu gushushanya ibikoresho byo mu nzu, nk'ibiti, amabuye ya marble, n'ibindi, kugira ngo ibikoresho bigaragare neza kandi bigezweho.
    Ibikoresho bya elegitoroniki: Uburyo bwo gucapa amazi bushobora gukoreshwa mu gushushanya ibikoresho bya elegitoroniki, nka telefoni zigendanwa, mudasobwa za tableti, nibindi, bigatuma ibicuruzwa bigira isura yihariye kandi igezweho.
    Inganda z'ibikinisho: Uburyo bwo gucapa amazi bushobora gukoreshwa mu gushushanya hejuru y'ibikinisho, nk'ibishushanyo by'inyamaswa, imiterere y'inyamaswa, n'ibindi, kugira ngo hongerwe ubwiza n'inyungu by'ibikinisho.
    Uburyo bwo gushushanya ubuso bwo kohereza amazi bufite uburyo bwinshi kandi bushobora gutanga imiterere yihariye ku bicuruzwa bitandukanye kugira ngo bihuze n'ibyo abaguzi bakeneye mu bijyanye no kwihaza no ubwiza.
  • Uburyo bwo Gucapa Amazi mu Ikoranabuhanga
    1.Igikoresho cyo gutera spray
    Imashini ikoresha imashini ikoresha amazi mu gucapa ni ibikoresho by'inyongera mu gucapa amazi, bikoreshwa mu kongera uburyo firime ikoresha amazi n'amazi ikorana. Ubusanzwe ikoreshwa mu buryo bwa spray, ishobora gupfukwa neza ku buso bwa firime ikoresha amazi.
    Imirimo y'ingenzi ya activator yo kohereza amazi mu icapiro ni iyi ikurikira:
    Kunoza uburyo firime ifatana: Imashini itera amazi ishobora gutuma firime ifatana n'amazi yegerana, yongera uburyo firime ifatana n'amazi, kandi ikareba ko igishushanyo gishobora kwimurirwa ku buso bw'ifirime.
    Ongera ubushobozi bwo gupfunyika kw'ifiriti: Imashini itera amazi ishobora gutuma ifiriti yo kohereza amazi yoroha gupfunyika mu mazi, igakora ishusho igororotse kandi ikarinda iminkanyari cyangwa ubusumbane muri iyo firiti.
    Kunoza imiterere isobanutse neza: Imashini itera amazi ishobora gutuma imiterere iri ku gapapuro ko kohereza amazi irushaho kuba myiza kandi ikirinda ko imiterere ihinduka cyangwa igahinduka.
    Dore intambwe zo gukoresha Water Transfer Spray Activator:
    Suka urwego rwa activator ku buryo bungana ku buso bwa firime yo kohereza amazi.
    Tegereza igihe gito kugira ngo activator yinjire neza kandi ikore.
    Shyira membrane mu mazi hanyuma ukore intambwe yo kwimura amazi.
    Icyitonderwa ni uko mu gihe ukoresha activator yo kohereza amazi, ugomba guhitamo activator ikwiye hakurikijwe ibisabwa na filime na substrate byihariye byo kohereza amazi, kandi ugakoresha ukurikije amabwiriza yo kuyikoresha. Muri icyo gihe, witondere umutekano mu gihe ukoresha, wirinde gukora ku ruhu no mu maso, kandi wirinde guhumeka cyangwa kubyinjiramo.
  • activatorcny yo gutera spray
  • kohereza printingj0f
  • Gucapa mu buryo bwo kohereza

    Gucapa amazi ni uburyo bwo gukoresha ikoranabuhanga ryo gucapa amazi. Imiterere y'icapa yimurirwa ku buso bw'ikintu binyuze mu ikoranabuhanga ryo gucapa amazi. Ubu buryo bushobora kugera ku miterere n'ingaruka zitandukanye, nk'imiterere, imiterere, inyandiko, nibindi, bigatuma ubuso bw'ikintu bugira imitako myiza kandi yihariye.

    Intambwe zo gucapa amazi ni izi zikurikira:

    Uburyo bwo gutegura: Hitamo agapira n'agapira byo kohereza amazi bikwiye, sukura kandi utunganye ubuso bw'agapira kugira ngo urebe ko agapira gashobora gufatana n'agapira.

    Shyiraho primer: Shyiraho urwego rwa primer ku buso bwa substrate kugira ngo wongere gufatana kwa firime no kugira ngo ishusho igaragare neza.

    Shyiramo amazi: Shyira agakoresho ko kohereza amazi mu mazi hanyuma utegereze ko agakoresho gakura neza maze gakore igishushanyo mbonera girambuye.

    Igikoresho cyo gusiga: Shyira urwego rwa activator ku buso bw'urukiramende kugira ngo wongere imikoranire n'ubufatanye hagati y'urukiramende n'amazi.

    Kwimura: Shyira buhoro buhoro substrate mu mazi kugira ngo igishushanyo kiri kuri firime gihure n'ubuso bw'substrate, hanyuma ukure substrate mu mazi.

    Gusukura no kumisha: Sukura ubuso bw'ubutaka n'amazi meza kugira ngo ukureho agahu gasigaye n'ikintu gitera imbaraga, hanyuma wumishe ubutaka.

    Gushyiramo irangi no gukonjesha: Uko bikenewe, irangi rishobora gukonjeshwa no gukonjeshwa kugira ngo ryongere ububengerane n'ubudahangarwa bw'ubuso.

    Binyuze mu gucapa amazi, imiterere n'ingaruka zitandukanye bishobora gukoreshwa ku bintu bitandukanye, nk'ibice by'imodoka, ibikoresho byo mu nzu, ibikoresho by'ikoranabuhanga, ibikinisho, nibindi. Ubu buryo bwo gushariza bufite ibyiza byo kugabanuka, koroshye gukoresha, no gukoresha mu buryo bugari, bityo bukaba bwarakoreshejwe cyane mu nganda zo gushariza.

  • Gukaraba amazi
    Koza amazi ni intambwe mu gikorwa cyo kohereza amazi. Bikoreshwa mu gusukura agapira n'icyuma bikoreshwa mu gukaraba hejuru y'ubutaka no kwemeza ko imiterere y'amazi igaragara neza kandi iramba.
    Intambwe zo gucapa no gukaraba amazi ni izi zikurikira:
    Nyuma yo kwimura ibintu, kuraho substrate mu mazi kandi urebe neza ko igishushanyo kiri kuri firime cyimuriwe cyose ku buso bw'substrate.
    Sukura hejuru y'ubutaka n'amazi meza kugira ngo ukureho agapfukamunwa n'icyuma gikoresha amazi. Ushobora gukoresha ibikoresho nk'imbunda ikoresha amazi cyangwa robine kugira ngo woge amazi ku butaka buringaniye.
    Witondere ubukana n'igihe cyo gukaraba kugira ngo wirinde gukaraba cyane, bishobora gutuma imiterere ihinduka cyangwa igasenyuka. Ubukana n'igihe cyo gukaraba bishobora guhindurwa bitewe n'imimerere runaka.
    Nyuma yo koza neza, wumishe ipasi. Ushobora gukoresha icyuma cyumisha umusatsi cyangwa ukareka kikakuma mu buryo busanzwe kugira ngo urebe neza ko ubuso bw'ipasi bumaze kuma burundu.
    Intego yo koza amazi ni ugukuraho agakoresho gasagutse n'icyuma gitera imbaraga, kwemeza ko imiterere yimuwe igaragara neza, no kongera igihe gihamye cy'imiterere. Muri icyo gihe, gucapa no koza amazi ni ukugira ngo ubuso bw'ubutaka bube busukuye kandi bunoze, no kwitegura intambwe zikurikiraho zo gutunganya nk'ubushyuhe n'ubukonje.
    Icyitonderwa ni uko mu gihe cyo koza amazi, hagomba kwitabwaho kurinda igishushanyo mbonera kiri ku buso bw'icyuma no kwirinda gukoresha ibikoresho nk'amazi atemba cyane cyangwa uburoso kugira ngo hirindwe kwangiza igishushanyo mbonera. Muri icyo gihe, hakurikijwe ibisabwa na firime n'icyuma gikoresha amazi, hashobora gutoranywa ibikoresho byo gusukura cyangwa ibindi bikoresho bikwiye kugira ngo byongere ingaruka nziza zo gusukura no kuramba kw'igishushanyo mbonera.
  • irangi ryo gusukura1a
  • kumisha onecvr
  • Kumisha

    Gutuma amazi yumuka ni intambwe y'ingenzi mu gikorwa cyo kohereza amazi. Bikoreshwa mu gushonga amazi ari ku buso bw'ubutaka, gukosora imiterere yimuwe ku butaka, no kongera kuramba no guhagarara kw'imiterere.

    Intambwe zo gucapa amazi yumisha ni izi zikurikira:

    Nyuma yo kwimura ibintu, kuraho substrate mu mazi kandi urebe neza ko igishushanyo kiri kuri firime cyimuriwe cyose ku buso bw'substrate.

    Koresha impapuro zifata amazi cyangwa igitambaro cyumye kugira ngo uhanagure buhoro buhoro ubushuhe buri ku buso bw'ubutaka kugira ngo ukureho ibitonyanga by'amazi birenze urugero.

    Shyira substrate ahantu hafite umwuka mwiza hanyuma ureke yumuke mu buryo busanzwe. Ushobora guhitamo ahantu hari ubushyuhe bwinshi mu cyumba n'ubushuhe buke kugira ngo wihutishe kurumisha.

    Bitewe n'imimerere runaka, ushobora gukoresha icyuma cyumisha umusatsi cyangwa icyuma cyumisha kugira ngo uhuhe umwuka ushyushye hejuru y'icyuma kugira ngo wihutishe inzira yo guhumeka no kumisha ubushuhe. Ariko, hakwiye kwitabwaho kugenzura ubushyuhe n'intera kugira ngo wirinde kwangirika cyangwa kwangirika kw'icyuma giterwa no gushyuha cyane cyangwa kuba hafi cyane.

    Nyuma yo kwemeza ko ubuso bw'ubutaka bwumye burundu, intambwe zikurikira zo gutunganya nk'ubushyuhe no gukaraba zishobora gukorwa kugira ngo igishushanyo mbonera cyongere ububengerane n'ubudahangarwa.

    Icyitonderwa ni uko mu gihe cyo kwimura amazi, hagomba kwirindwa kumisha cyane cyangwa gushyuha cyane kugira ngo hirindwe kugira ingaruka ku bwiza no kudatezuka kw'igishushanyo. Muri icyo gihe, hakurikijwe ibisabwa na firime n'ubutaka byihariye byo kwimura amazi, igihe n'ubushyuhe bikwiye byo gutorwa kugira ngo hamenyekane ingaruka nziza n'uburambe bw'igishushanyo.

    Igihe cyo kuma n'ingaruka z'imashini zicapa amazi bizaterwa n'ubushyuhe bw'ibidukikije, ubushuhe, ibikoresho bya substrate n'ibindi bintu, bityo bigomba guhindurwa no kugenzurwa hakurikijwe imiterere yihariye mu mikorere nyayo.

  • Irangi ryo gusukura
    Gusiga amarangi yo kohereza amazi ni uburyo bwo gukoresha mu gucapa amazi. Nyuma yo kurangiza gucapa amazi, icyuma gishyirwamo irangi kugira ngo cyongere uburinzi n'imitako by'igishushanyo.
    Intambwe zo gucapa amazi ni izi zikurikira:
    Nyuma yo kwimura ibintu, kuraho substrate mu mazi kandi urebe neza ko igishushanyo kiri kuri firime cyimuriwe cyose ku buso bw'substrate.
    Koresha impapuro zifata amazi cyangwa igitambaro cyumye kugira ngo uhanagure buhoro buhoro ubushuhe buri ku buso bw'ubutaka kugira ngo ukureho ibitonyanga by'amazi birenze urugero.
    Iyo bibaye ngombwa, substrate ishobora guterwa primer. Primer ishobora kongera uburyo bwo gufatana no gusobanura igishushanyo mu gihe inatanga urufatiro rwiza rwo gushushanya nyuma.
    Koresha ibikoresho byo gusiga amarangi kugira ngo usuke irangi ku buso bw'ubutaka. Amabara n'ingaruka bikwiye by'irangi ryo gusiga bishobora gutoranywa kugira ngo ugere ku musaruro wifuza wo gusiga.
    Witondere kugenzura ubugari n'ingano y'irangi rikoreshwa mu gusukura kugira ngo wirinde ko ritonyanga, rihinduka cyangwa ritameze neza. Hashobora gukorwa udupira twinshi kugira ngo ugere ku musaruro wifuza.
    Nyuma yo gusiga irangi, shyira irangi ahantu hafite umwuka mwiza hanyuma ureke irangi rimuke. Bitewe n'ubwoko n'ubugari bw'irangi rishyirwamo irangi, bishobora gufata igihe kugira ngo rirangiye.
    Nyuma yo kwemeza ko irangi rishyirwamo amavuta ryumye neza, hashobora gukorwa intambwe zikurikira zo gutunganya irangi nko kuringaniza no kuringaniza kugira ngo igishushanyo mbonera kirusheho kuba cyiza kandi kidashira.
    Icyitonderwa ni uko mu gihe cyo gusiga amarangi yo kwimura amazi, ibikoresho n'ibikoresho bikwiye byo gusiga amarangi yo kwimura bigomba gutoranywa kugira ngo harebwe ubwiza n'ingaruka z'irangi ryo kwimura amazi. Muri icyo gihe, hakurikijwe ibisabwa byihariye bya firime yo kwimura amazi n'ubutaka, ibara n'ingaruka by'irangi ryo kwimura amazi bikwiye bishobora gutoranywa kugira ngo hagerwe ku musaruro wifuza wo gusiga.
  • irangi ryo gusukura 1wc
  • kumisha twocja
  • Kumisha
    Nyuma y’uko irangi ryo kohereza amazi rirangiye, hakenewe izindi ntambwe zo kumisha kugira ngo irangi ryo kohereza rikomeze kandi rigakama, kandi rikomeze kuramba no guhagarara neza.
    Intambwe zo kumisha nyuma yo gucapa amazi ni izi zikurikira:
    Menya neza ko nyuma yo gusiga irangi, shyira irangi ahantu hafite umwuka mwiza kandi ureke irangi ritangire kuma. Bitewe n'ubwoko n'ubugari bw'irangi rishyirwamo, bishobora gufata igihe kugira ngo rirangiye.
    Ushobora gukoresha icyuma cyumisha umusatsi cyangwa icyuma cyumisha kugira ngo uhumeke umwuka ushyushye hejuru y’icyuma kugira ngo wihutishe uburyo bwo kumisha irangi. Ariko, hakwiye kwitabwaho kugenzura ubushyuhe n’intera kugira ngo wirinde kwangirika cyangwa kwangirika kw’icyuma giterwa no gushyuha cyane cyangwa kuba hafi cyane.
    Bitewe n'ubwoko n'ubugari bw'irangi rishyirwamo amavuta, bishobora gufata igihe kirekire kugira ngo rimuke. Ni byiza gutegura igihe cyo kumisha gikwiye hakurikijwe amabwiriza cyangwa uburambe bw'ibikoresho bishyirwamo amavuta.
    Nyuma yo kwemeza ko irangi rishyirwamo amavuta ryumye neza, hashobora gukorwa intambwe zikurikira zo gutunganya irangi nko kuringaniza no kuringaniza kugira ngo igishushanyo mbonera kirusheho kuba cyiza kandi kidashira.
    Icyitonderwa ni uko mu gihe cyo kumisha nyuma yo kwimura amazi, hagomba kwirindwa kumisha cyane cyangwa gushyushya cyane kugira ngo hirindwe kugira ingaruka ku bwiza no kudatezuka kw'igishushanyo. Muri icyo gihe, hakurikijwe ibisabwa n'ibikoresho byihariye byo gusiga irangi n'ubutaka, igihe n'ubushyuhe bikwiye byo kumisha bishobora gutoranywa kugira ngo hamenyekane ingaruka nziza n'uburambe bw'igishushanyo.
    Byongeye kandi, ibikoresho bitandukanye byo gusiga amarangi bishobora kugira ibisabwa bitandukanye byo kumisha. Ni byiza gukurikiza amabwiriza y'ibikoresho byihariye byo gusiga amarangi cyangwa kugisha inama impuguke kugira ngo urebe neza intambwe n'igihe byo kumisha neza.
  • Hari impamvu nyinshi zo guhitamo AnsixTech mu gucapa amazi, IMD, INS, TOM, OMD na DOD.
    Ubunararibonye bwinshi: AnsixTech ifite ubunararibonye n'ubuhanga bwinshi mu gucapa amazi n'ibindi bijyanye nayo. Basobanukiwe imiterere y'ibikoresho n'ibicuruzwa bitandukanye kandi bashobora gutanga ubufasha bw'umwuga mu bya tekiniki n'ibisubizo.
    Ibikoresho by’ubuziranenge: AnsixTech yiyemeje gutanga ibikoresho byo gucapa amazi byo mu rwego rwo hejuru n’ibindi bijyana nabyo. Bakoresha ibikoresho n’ikoranabuhanga bigezweho kugira ngo barebe ko uburyo bwo gutwara igishushanyo mbonera busobanutse kandi buhamye, buramba kandi bufite ingaruka nziza zo gushushanya.
    Serivisi zihariye: AnsixTech ishobora gutanga serivisi zo gucapa amazi zihariye ndetse n'izindi serivisi zijyanye nabyo bitewe n'ibyo abakiriya bakeneye n'ibyo bakeneye. Byaba ari igishushanyo mbonera, guhitamo ibikoresho cyangwa inzira y'ibikorwa, byose bishobora guhindurwa no kunozwa hakurikijwe ibyo abakiriya bakeneye.
    Uburyo butandukanye bwo gukoresha: Uburyo bwo gucapa amazi bwa AnsixTech n'ibindi bifitanye isano nabwo bishobora gukoreshwa mu nzego nyinshi, nko mu modoka, mu bikoresho byo mu nzu, mu bikoresho by'ikoranabuhanga, mu bikinisho, nibindi. Byaba ari ugukora ibintu byinshi cyangwa guhindura ibintu mu buryo buciriritse, dushobora guhaza ibyo abakiriya bakeneye.
    Serivisi nziza ku bakiliya: AnsixTech yibanda ku itumanaho n'imikoranire n'abakiriya kandi itanga serivisi nziza ku bakiliya. Bashobora gusubiza vuba ibyo abakiriya bakeneye n'ibibazo byabo, bagatanga inama n'ibisubizo by'inzobere.
    Niba uhisemo AnsixTech mu gucapa amazi, IMD, INS, TOM, OMD na DOD, ushobora kubona ubufasha bw'inzobere mu bya tekiniki, kandi dufite uburambe bw'imyaka irenga 10 mu kazi no mu ikoranabuhanga mu ikoranabuhanga ryo gushushanya imbere mu modoka. Ibicuruzwa byiza na serivisi zihariye kugira ngo bihuze n'ibikenewe mu nzego zitandukanye. Niba ufite ikibazo ku bicuruzwa biri mu ruganda rwa pulasitiki n'urusenda, twandikire ubutumwa (Imeri: info@ansixtech.com) igihe icyo ari cyo cyose kandi itsinda ryacu rizagusubiza mu masaha 12.