... porcelain receptacle 瓷插座 porcelain roller 瓷辊 porcelain sandstone 瓷砂石 ...
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The practise indicates that the leather belt spreads to move can make the roller of porcelain and ceramics work excellently and can protect it in the furthest extent, too.
实践表明：皮带传动可以实现陶瓷辊道的运行，并能最大程度地保护陶瓷辊道。
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