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Chemical Composition & Mechanical Property in Chinese Standerd Dimensions & Test Pressures of Welded Steel Pipe ASTM A53 SY 5297 GB/T 9711.1 API 5L Main Specification for Pipe Line
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Chemical Composition & Mechanical Property in Chinese StanderdDimensions & Test Pressures of Welded Steel PipeASTM A53SY 5297GB/T 9711.1API 5LMain Specification for Pipe Line