国产女人高潮毛片,久久久精品免费观看,91人妻人人澡人人爽人人玩,亚洲男人天堂午夜视频在线,国产日韩欧美精品不卡在线

　　該系列玻璃珠被普遍應用于染料、油漆、涂料行業(yè)的分撤、研磨介質(zhì)和填充劑。研磨珠具有大小均勻、表面光滑、硬度高、化學穩(wěn)定性好等特點。填充型玻璃微珠可用于改善增強玻璃鋼、橡膠等，耐熱、耐磨、抗壓強度等多項性能。

　　This type of glass beads is widely used in dye, paint, coating industry as disperser\abrasive media and filler. The grinding materials has the characters of the equal size, smooth surface, high hardness, chemical stability and so on. The filling materials can be used for rubber, glass fiber reinforced plastics etc. to increase its heat-resisting, abrasion resisting, compression strength performance.