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| 重力取样管 | |||
| 重力取心器 | |||
| 重力岩芯提取器; 重力垂直取样管 | |||
| 重力取芯器 | |||
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gravity corer : 2 phrases in 2 subjects |
| Nautical | 1 |
| Technology | 1 |
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