您要查找的是不是：
- 双工管[电] duplex tube
- 工管结合combination of Technology and Management
- 土工管袋geotube
- 管pipe
- type Ⅱsampling二型抽样
- ore sampling (采矿)矿石取样法
- 管的vasal
- side-wall sampling (石油)井壁取样
- 网管network management
- Coxs method of two-step sampling考克斯两步抽样方法
- 管路pipeline
- 品管QA
- 高管senior executive
- 弯管syphon
- 排气管vent-pipe
- 风管wind pipe
- 管件pipe fittings
- 配管tubing
- 热管thermotube
