Figure 1 is the tail of the crankshaft of an automobile engine. Auto mechanics know that the bearings in the picture are difficult to remove, and even if they are destroyed, it is laborious and time consuming to take them out. The bearing can be easily taken out by the following method. First, in the position of the cloth layer shown in Fig. 2, four to five layers of dense cloth (the cloth for washing the parts at ordinary times) can be pasted with butter. The role of the cloth is to block the inner and outer rings of the bearing.
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