ygs67 发表于 2018-1-3 16:22:29

ASTM A798 A798M-17

ASTM A798 A798M-17 Standard Practice for Installing Factory-Made Corrugated Steel Pipe for Sewers and Other Applications

admin 发表于 2018-1-8 15:29:24

谢谢您的分享，金币已奖励!
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