低压管子螺纹接头
Screwed joints of low pressure tube

2017-04-12

管子平肩螺纹接头
The flat shouder threaded joints of tube

2013-07-22

柴油机管子螺纹接头

1975-01-01

高压螺纹接头通舱管件规范
Specification of high pressure thread joint penetration pieces

2002-11-20