| 摘要 |
Titled appts. was composed of multi-slots moveable in the axial direction in the lifter case to maintain the sample ore, when a cylindrical ore mining sample from the stratum was gathered and crushed and then extracted through the drilling hole. Central axes were in the inner and outer surfaces of core lifter, which was extended to the axial direction in order to approach to the middle of the connecting part and composed of multi-slots remoted at constant intervals.
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