P&I diagram piping and instrument diagram
【运输】导管口
piping opening
暂无补充释义。
piping opening
暂无补充释义。
P&I diagram piping and instrument diagram
piping
piping system
piping
airtight test for refrigerant piping system【制冷】
vacuum test for refrigerant piping system【制冷】
piping support
buried piping