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One vegetable oil basic ring protects metalworking fluid and preparation method thereof
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A kind of metalworking fluid of the nano-titanium dioxide containing different-grain diameter and preparation method thereof
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A kind of preparation method of quick coupling wear-resistant pressure-resistant sealing ring
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A kind of processing method of extended life seal Composite rubber-ring
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A kind of automobile cast high-quality molding sand
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A kind of heat resist modification polyurethane rubber seal circle and preparation method thereof
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A kind of snap joint compared with high resilience seals coil preparation method
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A kind of preparation method of snap joint sealing ring
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A kind of casting sand mixing auxiliary material for reducing flange stomata and preparation method thereof
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A kind of casting sand mixing auxiliary material for strengthening flange surface finish and preparation method thereof
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A kind of flange cast case filler for substituting sand and preparation method thereof
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