Nrog txoj kev loj hlob sai ntawm kev lag luam hluav taws xob, PCB boards tau dhau los ua ib feem tseem ceeb ntawm ntau yam khoom siv hluav taws xob. Txawm hais tias nyob rau hauv cov neeg siv khoom siv hluav taws xob, tsheb hluav taws xob, lossis hauv kev kho mob, kev lag luam thiab lwm yam kev lag luam, kev thov ntawm PCBs yog qhov tseem ceeb tshwj xeeb. PCB boards yog ...
Nyeem ntxiv