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百洁布
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百洁布
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cleaning cloth
百洁布
纤维经饱和浸渍或喷洒黏合固网,黏合剂内常用酚醛树脂或环氧树脂作硬化剂,以金刚砂细粒(粒度180~320号)作磨料的产品。又称菜瓜布、洗碗巾。
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planetary ephemeris
planetary evolution
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planetary occultation of star
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