| 摘要 |
hole drilling. SUBSTANCE: invention refers to equipment designed to ream drilled holes in order to take rock samples of enlarged volume. Mechanical reamer includes body, mobile wedge-rod with parallel sides, adapter and support. Reaming blades including rollers and cutting members are joined to body. Spring is mounted in body between upper end of wedge-rod and adapter. EFFECT: improved rise of reamer on termination of reaming cycle of specified interval of hole. 1 dwg
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