近悉,北京军区司令部工程科研设计所研制成功了“干式除尘消音减振凿岩机”。用该凿岩机施工,可使粉尘浓度下降92%,彻底消除粉尘对人体的危害;同时,施工噪声降低105ｄＢ,凿岩速度提高22%,经费节约30%。该项成果已获国家科技进步二等奖。据称,该新型凿岩机的防尘、消音指标已超? Recently, the Beijing Military Command Engineering Research and Design Institute successfully developed a “dry-dust silencer vibration reduction rock drill.” With this rock drill construction, the concentration of dust can be reduced by 92% to completely eliminate the harm of dust to the human body. Meanwhile, the construction noise is reduced by 105dB, the drilling speed is increased by 22% and the cost is saved by 30%. The achievement has won the second prize of national science and technology progress. Allegedly, the new rock drill dust, silencer indicators have exceeded?