PCB yog tsim los ntawm hluav taws xob luam ntawv thev naus laus zis, yog li nws hu ua pawg thawj coj saib xyuas.Yuav luag txhua yam khoom siv hluav taws xob, xws li lub mloog pob ntseg, roj teeb, lub laij lej, mus rau computers, khoom siv sib txuas lus, dav hlau, satellites, ntev npaum li cov khoom siv hluav taws xob xws li kev sib xyaw ua ke ...
Nyeem ntxiv