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A kind of pressure prompting four-way union
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A kind of variable diameter two siphunculus connector
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A kind of carried of crude oil pipeline minute leakage accurate positioning device and monitoring method
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A kind of variable diameter varying pitch angle pipe equipment
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A kind of petroleum coke production equipment
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A kind of petroleum crude oil flash distillation device
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A kind of petroleum residual oil solvent extraction equipment
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A kind of oil slag oil solution extraction device
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Application method of seabed combustible ice mining drill bit
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A kind of method for cleaning of oil drill rocker
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A kind of offshore oil drilling current divider
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A kind of oil drill rocker
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A kind of petroleum pipeline on-bne repair unmanned plane
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A kind of petroleum pipeline repair method
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A kind of oil exploration multi-purpose unmanned aerial vehicle
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A kind of oil exploration method
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A kind of petroleum transportation pipeline anticorrosive paint production equipment
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A kind of petroleum transportation pipeline anticorrosive paint production technology
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A kind of petrochemical industry intermediate product production technology
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A kind of petrochemical industry retort
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