Tam sim no, qhov txwv ntawm lub qhov rooj opener manufacturers nyob rau hauv lub khw yog muab faib ua ob hom kev keyboards.
1. Lub caij nplooj ntoos hlav hloov chaw - kev qhib lub hauv paus Thaum lub qhov rooj tiv thaiv lub caij nplooj ntoos hlav, cov hlau shrapnel hauv qhov pib rub tawm cov teeb liab luv-teeb liab mus rau tus maub los, txwv tsis pub lub nquag kaw hom kov lub caij nplooj ntoos hlav, cov hlau shrapnel opens , thiab cov zis puas lawm. Cov teeb liab qhib
2. Hloov hloov hom kev hloov yog siv dav hauv kev ua lag luam vim nws pheej yig, ua haujlwm ntev thiab siab ruaj khov. Nws tseem raug faib ua hom qhib thiab nquag kaw. Thaum cov hlau nplaum raug kaw, qhov kev hloov qee zaus qhib siv xaj yog siv los xuas phom. Qhov teeb liab luv luv ntawm qhov teeb meem, qhov kev hloov xaj ntawm cov xaim hluav taws xob yog cov zis rau cov maub los, thiab qhov kev pabcuam tseem ceeb txog qhov kev txiavtxim siab kom tsis txhob siv fais fab mus rau lub tshuab ua haujlwm kom tsis txhob nres qhov haujlwm nres.
3. Hais txog cov no, ib tug neeg yuav tsum txhawj xeeb, vim li cas ho tsis ceev nrooj tham txog kev puas tsuaj ntawm qhov kev hloov yuav cuam tshuam rau qhov kev khiav haujlwm ntawm lub qhov rooj qhib, yog tias qhov raug kaw qhov raug kaw lawm, thaum lub qhov rooj qhib qhov chaw, lub sij hawm no, koj nias qhov chaw taws teeb tswj kom kaw, lub qhov rooj tsis tuaj yeem kaw, zawv zawg qhov rooj cav tsis teb, qhov no yog qhov kev puas tsuaj rau txoj haujlwm txwv tsis pub muaj teeb liab luv rau lub qhov rooj fais fab, uas ua rau lub qhov rooj tsis muaj peev xwm kaw, muaj lwm qhov teeb meem yog qee qhov kev lag luam uas tsis muaj kev cuam tshuam Cov kev txwv tsis pub tshaj tawm txwv tsis pub tshaj tawm, yog li ntawd tsis tuaj yeem kaw (qhov kev ruaj ntseg ntawm cov hlau nplaum tsis yog qhov tseeb);
Tib qho teeb meem no tshwm sim thaum lub npov nquag kaw qhov teeb meem muaj qhov teeb meem tib yam li qhov hom txwm txwm. Txawm li cas los xij, 99% ntawm cov keyboards hauv kev lag luam hauv khw feem ntau yeej qhib. Kev kuaj xyuas nrog ib tug multimeter tuaj yeem ua kom paub txog yam dab tsi.