liuxilin1215 发表于 2014-3-3 15:21:28

EN 1507-2006 建筑物通风 矩形面薄板金属送气管 强度和泄漏要

EN 1507-2006 Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage


admin 发表于 2014-3-3 17:04:23

谢谢您的分享，金币已奖励！

mechen 发表于 2014-3-21 14:44:52

Best Regard
Thanks for your sharing

terrylei 发表于 2017-5-26 01:03:08

Thanks for your share and thank you very much

yyou 发表于 2017-9-6 08:02:55

merci poue votre partage:lol;P
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