hgundas 发表于 2020-5-15 19:10:40

BS EN 13232-7:2006+A1:2011 Railway applications —




BS EN 13232-7:2006+A1:2011
Railway applications —
Track — Switches and crossings —
Part 7: Crossings with moveable parts

admin 发表于 2020-5-20 06:47:13

谢谢您的分享，金币已奖励!

shenshusong 发表于 2020-5-22 15:55:55

感谢分享，以后经常打卡，多多分享，学无止境。
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