Other Oil Field Equipments API 탄소강 3-1/2″, 9.3ppf, J55, 10rd, Nue, R2 API 유정 케이싱 튜빙 파이프 심리스 스틸 케이싱 파이프
Other Oil Field Equipments Drill Pipe Oil and Gas Well Casing Tube API 5CT J55, K55, N80q, L80, T95, P110, Q125, 13cr OCTG Casing Tubing and Drill Pipe with Btc, Nue, Eue, Premium/R3