安装带法兰的管路时，必须在两个对接法兰的密封间放置垫片。
When installing the pipeline with flange, the gasket must be placed between the two butt flanges.
提供焊接法兰的脖子上对接焊目的所需要的正确垫与邻近组成部分。
Provide welding neck flange butt welding required for the purpose of the right pad with neighboring component.
提供焊接法兰的脖子上对接焊目的所需要的正确垫与邻近组成部分。
Provide welding neck flange butt welding required for the purpose of the right pad with neighboring component.
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