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Control device for oil well oil-water content
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Numerical control optical wire-wound sieve tube gap detector
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Gas-supply pipe on-line monitoring lifting rod type ball valve
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Film type pneumatic damping actuator
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Metal mesh screen pipe compression molding equipment
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Umbrella type anti-extrusion ring
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A kind of reinforcing oil well rotary cement head
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A kind of three cylinder series damped actuators
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A kind of rising stem two-orbit divides valve ball valve
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A kind of black box
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Auxiliary expanding sealing system for drilling liner hanger
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A kind of orbit ball valve two-piece type spheroid
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Feeding device applied to filter sieve tube wire winding machine
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Double-rail groove hard sealing ball valve
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Welding jig for petroleum filter pipe sleeve hanger
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Petroleum filtering tube sleeve welding clamp and welding method
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Side milling head clamp
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Light weight type eccentric ball valve
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Automatic loading device for petroleum filter pipe drilling and application method thereof
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Under-pit petroleum sand-preventing filter tube
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