463 If there arises any abnormal temperature (unusual noises, vibration),it is necessary to stop the machine and investigate the cause.
如果产生不正常的温升（异常噪音、振动），必须停车查明原因。
464 You must turn off the switch when anything goes wrong with the motor.
如果电动机有什么毛病时，你必须关掉开关。
465 We have planned to finish the adjustment of the machine before Tuesday.
我们应该渐渐地增加压缩机的压力，并逐步投入满负荷运行。
466 The rotation number of the machine is on the increase.
机器的转数在增加。
467 After a few hours running , we shall check the machine; and replace the oil , if necessary.
在数小时运转后，我们将检查机器；并在必要时换油。
468 We shall select the suitable grease in accordance with the lubrication chart.
我们要根据润滑表来选用合适的油脂。
469 What is the trouble with the machine?
这机器有什么故障？
470 I think the trouble lies here.
我想故障在这里。
471 It is necessary that we should repair it at once.
我们必须立即修理它。
472 We shall give the machine another trial at 10 o’clock.
我们将在十点钟把这台机器再试一次。
473 The machine runs perfectly well,it had been operating with a continuous run of 72 hours.
这强机器运转很好，它至今已连续运转了七十二小时。
474 The result of the test run satisfied us.
试车结果使我们很满意。
475 It is not doubtful that the test run will be successful.
试车将会成功是无疑的。