1. Pauv.Lub ncoo yog lub qhov hlau siv los ua cov pins ntawm cov khoom.2. Txheej.Circuit board raws li qhov tsim ntawm qhov sib txawv, yuav muaj ob sab, 4-txheej board, 6-txheej board, 8-txheej board, thiab lwm yam., tus naj npawb ntawm cov khaubncaws sab nraud povtseg feem ntau yog ob npaug, ntxiv rau cov teeb liab txheej, ...
Nyeem ntxiv