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| 管端; 管口 | |||
| pipe end: 73 phrases in 14 subjects |
| Automobiles | 2 |
| Bridge construction | 1 |
| Drilling | 3 |
| Ecology | 2 |
| Engineering geology | 3 |
| Environment | 1 |
| Mechanics | 2 |
| Metallurgy | 9 |
| Oil / petroleum | 17 |
| Plastics | 3 |
| Rail transport | 3 |
| Refrigeration | 1 |
| Shipbuilding | 2 |
| Technology | 24 |
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