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API 5CT J55/K55/N80/P110 Casing Coupling 4 1/2" to 20" Api Casing Coupling ...
Api Casing Coupling Size 4 1 / 2-20in Thread VAM NU EU STC LTC BTC NPT ...
commodity name Oilfield Steel Casing Tubing Pipe Coupling Joint Executive stand...
The main products of our company are the oil casings and oil pipelines. We not only s...