求翻译：The computer then compares the output subassembly stack height to the distance between the housing bearing seats and calculates the shim pack required for the desired bearing endplay. Using the worm-gear centerline measurement, it shows assemblers how to distribute shims between the front and rear hearings to precisely center the gear in the housing. Measurement accuracy is ±0.001 in. Total cycle time, excluding loading and unloading, is less than 20 sec.是什么意思？

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