397 The alignment of the coupling should be performed by two dial gauges.
靠背轮的找正对准应用两只千分表来进行。
398 The maximum allowable misalignment of the coupling is 0.02mm.
靠背轮找正的最大允许偏差为0.02毫米。
399 How many radial (axial ) clearnance are there in this bush (journal bearing , thrust bearing) ?
这个轴套（轴颈轴承、止推轴承）的径向（轴向）间隙是多少？
400 Does the bolt fit the nut?
螺栓与螺母不配。
401 We prefer welding to riveting.
我们认为焊接比铆接好。
402 Do you know how to assemble (adjust )this new machine?
你知道如何装配（调整）这台新机器吗？