check valve to manifold pipe

pipe管道词汇 -... ... charge pipe 加料管 ? check-valve to manifold pipe 止回阀至歧管管 ? chemical pipe line 化学管线 ? ...

valve-... ... check-valve to manifold pipe 阀阀 阀 阀 阀 止回 至歧管管 chimney valve 阀阀 阀 烟道 气 ...