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在农机修配工作中,常遇到一些半圆键因损坏需重新配制。这时就要根据旧键的尺寸,计算出半圆键的直径d。由图可知,d可由下式求得:
In the work of repairing agricultural machinery, often encounter some semi-circular key due to damage to be re-formulated. Then according to the size of the old key, calculate the diameter of the semicircle key d. It can be seen from the figure, d can be obtained by the following formula: