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GB/T3077
GB/T3077
GB/T3077 Standard Specifies the delivery standard for alloy structural steel.GB/T3077 standard main steel grade:27SiMn,45#,35#,20# and so on.
GB/T3077 27SiMn automotive and mechanical structure pipe
GB/T3077 45# automotive and mechanical structure pipe
GB/T3077 35#automotive and mechanical structure pipe
GB/T3077 20#automotive and mechanical structure pipe
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XICHENG SCIENCE & TECHNOLOGY BUILDING HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA
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