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芯砂
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芯砂
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core sand
芯砂
铸造中用以制造砂质型芯(砂芯),将铸造砂、型砂黏结剂、硬化剂、水及其他添加剂按一定比例和混制工艺等制备的混合料。是一种造型材料。
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occupational orientation
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Occupational Safety and Health Convention
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occupational teratogen
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