论文部分内容阅读
操作人员通常可以在危险区50英尺以外的地方,选择最安全、最方便的控制点。在地下煤矿和硬岩开采中,使用类似的无线电装置控制采矿设备,可获得很大的生产效益。数字与音频无线电设备的对比在过去二十多年中,工业上已使用了各种不同的无线电控制方法。音频调制系统是
Operators often can choose the safest and most convenient control point 50 feet beyond the danger zone. In underground mines and hard rock mining, using similar radios to control mining equipment can yield significant production benefits. Comparison of digital and audio radio equipment For the past two decades or so many different radio control methods have been used industrially. Audio modulation system is