一极国产亚一级高淸视频,午夜丰满少妇一级毛影院,2021国产毛片无码视频,国产欧美日韩在线不卡高清,综合亚洲另类欧美久久成人

This product is adhesive the small pieces of hexagonal ceramic tile, used for mining industry.?

The products, which are of excellent wear-resistance, impact-resistance, easy operation are ideal surface wear-resisting material for material transfer equipment in mining, iron & ?steel?works, thermal & power plants, mine, etc, and can extend operating life of equipment effectively. Theoretically the life time of the alumina ceramic is about 260 times longer than that of manganese steel and 170 ?times longer than that of chrome steel.