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在苏联东北低温条件下的岩石中,采用干式捕尘凿岩。1963年,全苏工具科学研究所协同超硬材料研究所设计并制造了三种型式带吸尘孔的36毫米小直径钎头(图1):一字形(Д-36-22-
In the Soviet Union under the conditions of low temperature rock northeast, the use of dry-catching rock drilling. In 1963, ThyssenKrupp Institute of Tool Science collaborated with the Institute for Superhard Materials to design and manufacture three types of 36 mm small diameter drill bits with suction holes (Fig. 1): Inverted (Д-36-22-