标题: BS 21-1985 Pipe threads for tubes and fittings where pressure tight joints are [打印本页] 作者: nbkxhwd@163.com 时间: 2020-7-2 11:03:22 标题: 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
[attach]228698[/attach] 作者: admin 时间: 2020-7-6 12:01:41