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boiler scaling
| tool
| boiler scaling | |
| tech. | 成垢作用 |
| tool | |
| dril. | 工 具 |
| hydroel.st. | 工具; 量具 |
| mech. | 钻杆 |
| met. | 刃具; 刀具; 器械; 方法; 手段 |
| |||
| 成垢作用 | |||
| boiler scaling: 7 phrases in 2 subjects |
| Shipbuilding | 1 |
| Technology | 6 |