Reversible casing for a down-the-hole percussive apparatus.
作者： Warren T. Lay , Leland H. Lyon
DOI:
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摘要: A reversible casing (9) for a down-the-hole drill has predetermined snap ring (50) groove length centered between the ends (11, 15), based upon bore (42), depth and body length, whereby will be retained in (72), while permitting lengthwise movement of during reverse orientation (19).
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