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| 金刚石钻进的钻孔 | |||
| 金刚石钻孔; 菱形钻孔洞 | |||
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| 金刚石钻具钻孔 | |||
| 金刚石钻进钻孔 | |||
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diamond drill hole : 1 phrase in 1 subject |
| Technology | 1 |
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