HDD Drilling Tools, Water Well Drilling Machine, Solid Control Equipment manufacturer / supplier in China, offering API 6A 21-1/4" 2000 X 21-1/4" 2K Spacer Spool 5 FT Long Drilling Adapters Flange Spacer Spool, API 6A Dsa Double Studded Flange Drill Adapter Spacer Spool, Flange Drilling Spacer Spool for Drilling Flange Raised Sub and so on.
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