Measure （） by means of lead wire.<br>A:the clearance of the main bearing<br>B:the diameter of main bearing<br>C:the hardness of main bearing<br>D:the tolerance of main bearing

Measure （） by means of lead wire.
A:the clearance of the main bearing
B:the diameter of main bearing
C:the hardness of main bearing
D:the tolerance of main bearing

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