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A kind of card Piston for vehicle that wear-resisting property is good
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A kind of numerically-controlled machine tool clamping device
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A kind of numerically-controlled machine tool filter device
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A kind of corrosion resistant type piston of automobile engine
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A kind of wear-resisting type piston of automobile engine
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A kind of base of digital-controlled machine tool convenient for heat dissipation
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A kind of high strength type piston of automobile engine
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