重庆时时彩app
葡亰手机
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Liaoning Northern Steel Pipe Co., Ltd., (its former entity - Northern Steel Pipe Co., Ltd. of Haicheng), the modern Sino-Hong Kong joint venture, is specialized in producing steel pipes like petroleum tubing, casing, line pipe and design & development as well.
Liaoning Northern Steel Pipe Co., Ltd. was established in 1992, and has been conferred Det Norske Veritas (DNV) ISO9002 Quality Management System Certificate & API 5L Certificate in 1997 and API 5CT Certificate in 2000 which are re-audited regularly……

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重庆时时彩app
325ERW production line

168ERW production line
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Standard
◇API  5L  pipe line _葡亰手机 ◇API 5CT casing
◇API 5CT tubing
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