Xov Xwm Tuam Txhab
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Kev ua cov txheej txheem ntawm optical lens yog qhia
Optical txias ua hauj lwm 1. Polish lub optical lens, lub hom phiaj yog tshem tawm ib co ntxhib tshuaj nyob rau saum npoo ntawm optical lens, thiaj li hais tias lub optical lens muaj ib tug preliminary qauv.2. Tom qab pib polishing, poli...Nyeem ntxiv
