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根据省局的指示，1964年9月开始，我们组织了DL-34型凿岩机的生产性试验。到今年6月为止，先后进行了447个台班的试验，共掘进独头平巷330米，台月效率平均69米，单位成本平均136元。经过半年多的摸索，我们初步掌握了这种机器的性能，取得了一些操作维护以及管理上的经验。从实践中，我们体会到DL-34型凿岩机，具有以下几个显著的优点：
According to the instruction of the provincial bureau, starting from September 1964, we organized the production test of the DL-34 rock drill. As of June this year, 447 test flights have been carried out successively, with a total length of 330 meters and an average efficiency of 69 meters. The unit cost is 136 yuan. After more than six months of exploration, we preliminary mastered the performance of this machine, made some operation and maintenance and management experience. From practice, we realize DL-34 rock drill, has the following several significant advantages: