“如果各项准备工作及时到位,平均下来打一个直径1.5m,深度45m的孔在不到4h就可完成。这台旋挖钻机施工近2个月来基本没出过什么毛病。最让我们满意的是宇通售后人员尽职尽责的售后服务。”郑州某公司阿深高速公路信阳段项目经理张俊里见到笔者满意地说。像国内很多知名公司一 “If all the preparations are put in place on time, on average, a hole with a diameter of 1.5m and a depth of 45m can be completed in less than 4h. This rotary drilling rig basically did not show any problems during the past two months. Satisfied with the Yutong sales staff dutifully after-sales service. ”Zhengzhou A deep highway Xinyang Zhang Junli project manager to see the author said with satisfaction. Like many well-known domestic companies