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三闸板
| 防喷器
| 三闸板 | |
| mech. | triple ram |
| 防喷器 | |
| dril. | blow-out preventer; preventer |
| earth.sc. | blowout preventers; water propeller |
| mech. | blowout preventer |
| nautic. tech. | blow-off preventer; BOP; blow off preventer |
| oil | blowout preventer |
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| triple ram | |||
| 三闸板: 1 phrase in 1 subject |
| Oil / petroleum | 1 |
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