- 重点词汇
- 泵阀
pump valve; pump and valve; valve for pumps
- 管道
pipeline; conduit; duct; channel; tubing; piping; pipework; passage; pipe
- 服务
service; hospitality; ministrations; serve; minister; be in the service of; give service to
- 展会
exhibition; expo; fair; exposition
- 查询
inquiry; enquiry; reference; check; inquire; consult; interrogate; check up on