Tom qab siv ib lub sijhawm, LED qhia pom cov plua plav, impurities, thiab av ntawm lawv qhov chaw, uas tuaj yeem cuam tshuam rau lawv cov kev ua tau zoo thiab txawm tias ua rau muaj kev puas tsuaj yog tias tsis ntxuav tsis tu ncua. Kev saib xyuas kom zoo yog qhov tseem ceeb rau sab nraum zoov LED cov ntxaij vab tshaus kom tswj tau lawv qhov kev pom zoo disp ...
Nyeem ntxiv