我国第一台4立方米步行式长臂挖掘机,已在太原重型机器厂试制成功(见封底图)。这台挖掘机身高9.7米,身长13米,肩宽10.02米,休重183吨,它站在岸边,能通过自己40米长的长臂下的大铲斗,从周围45米以内,32米深的河床里,一把抓起4立方米的泥砂,转身把泥砂送到岸边40多米以外的地方。从挖起泥砂、倒掉、再转回来,只需要46秒钟。它一小时能挖出泥砂200多立方米,相当于3000个劳动力1小时完成的工作量。它的力气极大,1米厚的冰层一下子就能突破,遇到严寒,即使 China’s first 4-cubic-meter walking long-arm excavator has been successfully tested at Taiyuan Heavy Machinery Factory (see the back cover). The excavator is 9.7 meters tall, 13 meters in length, 10.02 meters in shoulder, and 183 tons in weight. It stands on the shore and can pass through a large bucket under its 40-meter-long long arm, within 45 meters from the surroundings. In the 32-meter deep riverbed, one grabbed 4 cubic meters of silt and turned to send the mud sand to the shore more than 40 meters away. It only takes 46 seconds to dig up the mud, dump it, and turn it back. It can excavate more than 200 cubic meters of silt in one hour, which is equivalent to the workload of 3000 labors completed in one hour. Its strength is so great that a one-meter-thick layer of ice can break through at once and it will be cold, even though