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Contact Person Mr. jeff
NO.16 Baoyaun road, tianjin, tianjin
introductions 1&#****9; Buttress thread casing couplings and extend-upset tubing use the special –clearance couplings 2&#****9; With the same specifications for the different types of thread portfolio, portfolio collar. 3&#****9; Appendix A8 (SR*3) to seal ring groove, the seal ring to the collar. 4&#****9; Non-upset and extend-upset tubing use special-bevel couplings type teeth/inch specs extend-upset tubing thread *0 teeth 1.**0&#****8;1.**5&#****8;1.**0&#****8;1.**0&#****8;
