※ Lub Cheebtsam tseem ceeb ntawm cov dej ntim yog silicon, silica thiab alumina; lub chaw ua haujlwm loj: Tuam Tshoj, Tebchaws Asmeskas, Tebchaws Europe thiab Nyiv.
① Tuam Tshoj thiab Teb Chaws Asmeskas tseem ceeb tshaj plaws yog silica, pheej yig, cuam tshuam ntau plua plav.
② Teb chaws Europe qhov tseem ceeb ntawm alumina, tus nqi siab, tsawg dua ploj thaum polishing, vim yog lub mis, nws muaj roj heev.
③ Nyiv kuj yog qhov tseem ceeb ntawm alumina, qhov zoo yog qhov zoo, qhov zoo tshaj plaws workmanship thiab ntau npaum li cas, tab sis tus nqi kim dua.
Hom qes tshaj: 3M, Micron, Vaub kib hom, Manzelner thiab Sonax thiab lwm yam.