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| shot bit | |||
| chilled shot-bit; crown for chilled shot; shot drilling bit; shot-crown | |||
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钻粒钻头 : 30 phrases in 6 subjects |
| Drilling | 10 |
| Engineering geology | 3 |
| Mechanics | 1 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Technology | 11 |
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