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CN109340417A
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A kind of O-ring seal welding type check valve
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CN109161771A
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A kind of novel tungsten alloy and preparation method thereof
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CN109234597A
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A kind of tungsten-copper alloy and preparation method thereof
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CN109058506A
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A kind of forged steel metal hard-sealing ball valve
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CN109114230A
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A kind of needle-valve of riveting ball
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CN109058475A
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A kind of bellows needle-valve
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CN109114235A
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It is a kind of can on-line maintenance sealing surface needle-valve
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CN109114248A
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A kind of hydraulic ball valve
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CN108953751A
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A kind of panel installation high-pressure ball valve of easy structure
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CN109027300A
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A kind of imitative outer-hexagonal stick high-pressure ball valve
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CN108953662A
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A kind of cast steel metal sealing V-type ball valve
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CN109027282A
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A kind of bracing type double gate valve cast steel flat gate valve
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CN108953701A
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A kind of soft seal three-chip type check valve
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CN108561570A
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A kind of disc spring loaded packing work valve prong valve
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CN108679243A
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A kind of needle-valve that can replace valve seat online
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CN108692071A
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A kind of large-flow check valve
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CN108626446A
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A kind of full-bore big flow straight check valve
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CN108468812A
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A kind of double isolation needle-valves of super-pressure
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CN108561582A
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A kind of special high pressure three-stage ball valve
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