近几年,在我们系统的现场设备检查中,一些设备内外整洁,机械运转性能好,设备利用率高,使用寿命长。如杭州两个土建公司,1970年购进JG250、JG150砼搅拌机各一台,由于操作手能按“安全操作规程”使用机械,又能及时、精心保养设备,使这两台设备在正常情况下用了十年时间才进行大修,在为现场服务中 In recent years, in the field equipment inspection of our system, some equipments are clean inside and outside, the mechanical operation performance is good, the equipment utilization rate is high, and the service life is long. For example, two civil construction companies in Hangzhou purchased one of the JG250 and JG150 mixers in 1970. Because the operator can use the machinery according to the “Safety Operation Procedures”, they can also timely and carefully maintain the equipment, so that the two devices are under normal conditions. It took ten years to carry out major repairs.