Some piping outfitting is done when building sub-blocks, that is, on-block outfitting;

有些管路舾装在制造小分段时就开始了，也叫做分段预舾装；

youdao

Some piping outfitting is done when building sub-blocks, that is, on-block outfitting;

有些管路舾装在制造小分段时就开始了，也叫做分段预舾装；

youdao