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China oilfield casing pipe oil tubing pipe API 5L oil seamless steel pipe, US $ 1000 - 1000 / Tonne, API, API 5CT, API certificate, API J55-API P110, API J55, API K55, API L80, API P110, 5 - 22 mm.Source from Yantai Sanmon Machinery Equipments Co., Ltd. on Waimaotong.com.
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