其他名称：六角内接头、外螺丝、六角外螺丝、外丝箍。由可锻铸铁制成，公称压力为1.6Mpa。
misc. inner joint
本衬垫适用于角钢对接内接头CO2单面焊使用，有各种规格供选用。
This backing(internal) is specially designed for CO2 one-side welding of angle steel butt joints. Different backing sizes are supplied.
本发明公开了一种密封内接头，所述一种密封内接头包括一个有槽管件内接头和二个密封圈。
The present invention discloses a sealing union, which comprises a union of pipe fittings with groove and two sealing rings.
开发的新型管道封堵器由中心管、气囊、活塞、弹簧、夹板、护板、内接头、外接头、连接板和楔键等组成。
A newly developed pipeline plug is composed of a central pipe, balloon, piston, spring, clamp, backplate, inside and outside joints, connecting plate and a wedge key.
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