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| градационный хомут | |||
| дистанционирующий ободок | |||
| градационный хомут (卡式制动阀上的) | |||
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| градационный хомут | |||
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定位箍 : 8 phrases in 3 subjects |
| Drilling | 2 |
| General | 5 |
| Geophysics | 1 |
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