 |
| |||
| pneumatic channel | |||
| conduit; duct; line; main; pipe; tubing | |||
| piping and conduit | |||
| pipeline; pipeline A line of pipe connected to valves and other control devices, for conducting fluids, gases, or finely divided solids | |||
| |||
| piping | |||
| pipelines | |||
| rorledning: 51 短语, 16 学科 |
| 一般 | 9 |
| 专利 | 2 |
| 农业 | 1 |
| 冶金 | 2 |
| 化学 | 4 |
| 地球科学 | 1 |
| 市政规划 | 1 |
| 建造 | 3 |
| 机械工程 | 7 |
| 煤炭 | 1 |
| 环境 | 2 |
| 电子产品 | 4 |
| 石油/石油 | 1 |
| 能源行业 | 3 |
| 财政 | 1 |
| 运输 | 9 |