nbkxhwd@163.com 发表于 2020-7-2 11:03:22

BS 21-1985 Pipe threads for tubes and fittings where pressure tight joints are

BS 21-1985 Pipe threads for tubes and fittings where pressure-tight joints are made on the threads

admin 发表于 2020-7-6 12:01:41

谢谢您的分享,金币已奖励!
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