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The steel grades of common oilfield API-5CT casing pipe include J55, K55, N80-1, N80Q...
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ARK Steel Tube | Steel Tube Solution | Steel Tube Specialist We are producing the ...
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Feature : (1) The bolts have high strength stress ,good support capacity can preve...
(1) The bolts have high strength stress ,good support capacity can prevent the roof f...
Point anchoring rock boltis composed of screw thread steel bar , high strength plate ...
(1) Be made of steel strand,and has incomparable flexible capacity and anti-shearing ...