QQ快速登录
一步迅速开始
Nipple By design, screwed andsocket-weld fittings cannot be assembled by placing one fitting directly incontact with another fitting. Screwed fittings are manufactured with threads onthe inside of th ...
|关于我们|网站地图|开云平台官方入口 ( 鲁ICP备11007657号-3 )
GMT+8, 2024-11-24 17:44 , Processed in 0.029526 second(s), 15 queries , Gzip On, MemCached On.
Powered by Discuz! X3.5
Copyright © 2001-2023开云注册登录 .