Ntsig txog kev kho vajtse hais txog kev kho vaj tsev kho dua tshiab ntawm qhov kev lag luam kho vajtse, yog ib feem ntawm qhov kev lag luam kev kho vajtse, qhov tseem ceeb ntawm qhov yuav tsum tau ua hauv 0.05 hli kho vajtse ua haujlwm.
Ib lub tshuab los yog ib feem ntawm kev kho vaj tse, nrog rau tej yam cuab yeej hardware.Thaum yuav siv rau nws tus kheej, los yog nws yuav siv tau li ib facilitator.Such li cov cuab yeej hardware, Radon Cheebtsam, hnub kho vajtse, tsev kho vajtse thiab cov khoom ruaj ntseg. Feem ntau cov khoom siv kho mob tsis yog cov khoom siv cuab yeej zaum kawg. Nws yog siv raws li cov khoom txhawb nqa, khoom ib yam khoom tiav thiab ib lub cuab tam rau cov txheej txheem ntau lawm.Txawm feem tsawg hnub khoom kho khoom siv (accessories) cov cuab yeej tsim nyog rau cov neeg nyob.