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Product profile
Process chart
Major Parameter
Product Specification
Quality Inspection
Quality Guarantee
Major Project
Product Specification for petroleum and natural gas transportation
(According to GB/T 9711.1-1997，GB/T9711.2-1999 and API SPEC 5L)
Product Specification for common fluid，heat supply and pile
(According to SY/T 5037-2000，SY/T5040-2000 and CJ/T3022-93)
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