Peb lub lag luam tseem ceeb yog cov yas hluav taws xob hluav taws xob, lub tshuab nqus tsev thiab cov khoom siv hauv tsev muaj feem xyuam nrog cov khoom siv yas, nrog cov chaw kuaj xyuas zoo thiab cov kev siv zog muaj zog, tag nrho peb cov khoom dhau los ntawm peb cov kev tswj xyuas nruj, feem ntau ntawm cov khoom tuaj yeem dhau CE, GS, LFGB thiab RoHS ua raws
