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介绍了一些有关非开挖可控气动冲击矛的专利技术和目前国内外几种可控气动冲击矛产品和样机,简要阐述了它们的结构和工作原理,并作了一些简单比较。
This paper introduces some patented technologies about tamper-controlled pneumatic impact spear and several kinds of controlled pneumatic impact spear products and prototypes both at home and abroad. The structure and working principle of them are briefly described, and some simple comparisons are made.