Cov khoom

Peb lub tuam txhab yog cov chaw tsim khoom ntawm cov khoom siv nqus tsev vacuum. Peb tuaj yeem muab cov cuab yeej kho kom haum raws li qhov xav tau tiag tiag ntawm cov neeg siv khoom hauv kev lag luam sib txawv, xws li: kev ua haujlwm thiab kev tsim khoom ntawm RV cov tuam txhab; kev tsim tsheb; ua thiab ntau lawm ntawm semiconductor silicon rods thiab blocks; tuav cov khoom siv hluav taws xob tshiab; iav sib sib zog nqus ua; iav kab hlau rhuav phab ntsa installation, thiab lwm yam. Nyeem ntxiv