Control lows drainage pipeline gas sources.
控制气源管线低位排水.
互联网
Design experience of water supply and drainage pipeline project is introduced in the paper.
本文介绍了石油化工企业给水排水管道工程的设计经验.
互联网
Have explained some views while laying for the drainage pipeline in the room.
阐述了室内给排水管道敷设时的一些观点.
互联网