Cov Rooj Tswjhwm Luam Tawm (PCBs) yog lub hauv paus ntawm kev lag luam hluav taws xob, ua haujlwm ua lub platform tseem ceeb rau kev sib txuas hluav taws xob thiab kev xa cov teeb liab. Yuav kom ua tau kom muaj kev sib txuas ntawm cov txheej txheem thiab kev teeb tsa cov khoom hauv cov rooj sib tham ntau txheej, kaum tawm txhiab tus microvias yuav tsum tau ua kom meej ...