 |
| |||
| 闩紧机构 | |||
| 棘轮; 罐笼断绳防坠装置; 闭锁装置; 锁紧装置; 锁紧机构 | |||
| catch gear: 4 phrases in 4 subjects |
| Construction | 1 |
| Drilling | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
|
| |||
| 闩紧机构 | |||
| 棘轮; 罐笼断绳防坠装置; 闭锁装置; 锁紧装置; 锁紧机构 | |||
| catch gear: 4 phrases in 4 subjects |
| Construction | 1 |
| Drilling | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |