Sab nraud ntawm cov khoom yog ci, huv si, tsis muaj kev puas tsuaj, lub davhlau ya nyob twg yog du thiab raug, thiab lub npe phaj yog qhov tseeb thiab ruaj khov.
Cov khoom no siv tau rau cov khoom siv ntsuas.Peb muaj ntau lawm rau lwm tus neeg siv khoom, thiab tuaj yeem txais kev kho raws li cov neeg siv khoom tsis muaj.
Cov kev cai thiab cov khoom siv hluav taws xob: ua raws li GB19212.1-2008 Kev Nyab Xeeb ntawm Cov Hluav Taws Xob Hloov Hluav Taws Xob, Cov Khoom Siv Hluav Taws Xob, Cov Khoom Siv Hluav Taws Xob thiab Cov Khoom Siv Zoo sib xws - Ntu 1: Cov Kev Xav Tau thiab Cov Kev Ntsuas, GB19212.7-2012 Kev Nyab Xeeb ntawm Transformers, Reactors, Cov Khoom Siv Hluav Taws Xob thiab Zoo sib xws Cov khoom siv hluav taws xob hluav taws xob ntawm 1100V thiab hauv qab no - Ntu 7: Cov Kev Xav Tau Tshwj Xeeb thiab Kev Ntsuas Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb Kev Nyab Xeeb thiab Cov Khoom Siv Hluav Taws Xob nrog Kev Nyab Xeeb Kev Ruaj Ntseg Transformers.
