Petroleum Machinery, Fishing Tool manufacturer / supplier in China, offering Zsj/ Zxj Hydraulic Mechanical Drilling Jar Super Fishing Jar Bumper Jar Drilling Jar API Spec 7-1, API 4145h Rotary Sub Crossover Sub Joint for Oil Well Drilling Pipe Drill Collar and Kelly, Oriented Bent Sub Downhole Deflection Connection Tool and so on.
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