Small diameter impact boring tool impact head
作者： Songnian Wang , Robert L. Collins , Glen Prater , William P. Hnat
DOI:
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摘要: An elongated tube has a high pressure feed line on one end and an impact head the other end. A intermediate ends of tool houses two cylinders having piston is in each cylinder. The pistons are tied together by rod extending through bulkhead dividing coaxially aligned cylinders.
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