Txais tos rau peb lub vev xaib rau cov khoom lag luam cov ntaub ntawv thiab kev sib tham. Peb lub vev xaib: https://www.vet-china.com/ Etching ntawm Poly thiab SiO2: Tom qab qhov no, ntau tshaj Poly thiab SiO2 raug tshem tawm, uas yog, tshem tawm. Lub sijhawm no, kev taw qhia etching yog siv. Hauv kev faib ...
Nyeem ntxiv