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Powder-metallurgy valve seat insert and preparation method thereof
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Powder metallurgy flange and preparation method thereof
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Powder-metallurgy slippage pump rotor and preparation method thereof
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Powder metallurgy flange and preparation method thereof
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Powder metallurgy wind power pivoting support and preparation method thereof
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Powder metallurgy valve seat and preparation method thereof
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Adhesive with strong adhering property
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Method for preparing gate valve disc through casting molding
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Preparation method of ball valve body
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Method for casting valve base of plug valve
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Method for casting valve plate of stop valve
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Preparation method for cast-molding diaphragm valve flap
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Preparation method of swing check valve plate
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Method for preparing valve rod of plug valve
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Preparation method for diaphragm valve body through cast molding
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CN102994867A
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Preparation method for check valve spool through cast molding
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CN102994907A
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Casting method of check valve body
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Method for casting valve body of ball check valve
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Casting method of valve body of anti-explosion valve
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Casting method of gate valve rod
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