Reverse circulation drill for geological prospecting, and power head thereof
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| creator | YUAN ZHANWU REN XINGWANG FENG LIN YAN SUWEI |
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| language | eng |
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| subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
| title | Reverse circulation drill for geological prospecting, and power head thereof |
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