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| 堵塞止水剂 | |||
| 止水剂; 密封剂 | |||
| 堵塞剂 | |||
| 封堵剂 | |||
| 油的堵火剂 | |||
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plugging agent : 2 phrases in 1 subject |
| Oil / petroleum | 2 |
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