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G40.20-04/G40.21-04
General Requirements for Rolled or Welded Structural Quality Steel/ Structural Quality Steel
现行
发布日期 :
1970-01-01
实施日期 :
G40.20-04 General requirements for rolled or welded structural quality steel 1 Scope 1.1 This Standard outlines the requirements that apply, unless otherwise specified in a purchase order or individual standard, to structural quality steel plates,