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Test lubricator subassembly
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Elastic paraffin scraping and sand washing type guide cone for oil field
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Oil field sleeve paraffin scraping tool
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Simulate downhole packer experimental rig
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Repeatable docking salvaging type hollow bridging plug
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The hybrid sampler of T-type
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A kind of wellhead sealing gasket ring alarm
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Single-well injection-production surface separation recirculation control device
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A kind of blowout preventer alarm of good airproof performance
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