 |
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| jack-up drilling rig; jack-up platform; jack-up rig; self-elevating drilling rig; self-elevating platform | |||
| hefeiland: 1 短语, 1 学科 |
| 煤炭 | 1 |
|
| |||
| jack-up drilling rig; jack-up platform; jack-up rig; self-elevating drilling rig; self-elevating platform | |||
| hefeiland: 1 短语, 1 学科 |
| 煤炭 | 1 |