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          Soft Composite

          Soft composite silicon powder is a kind of natural quartz and other inorganic non-metallic minerals as raw materials, through various processes such as compounding, melting, cooling, crushing, ultra-fine grinding, precision grading, surface treatment, etc

          【Product Series】:

          YS-FR YS-HFR YS-ZF YS-HZF
          精品人妻中文字幕无码二区_337p日本欧洲亚洲大胆_欧美性夜影院亚洲_亚洲综合欧美二区