Modern handheld digital tachometers operated by counting light pulses returned to the unit by -题库考试答案搜索网

Modern handheld digital tachometers operated by counting light pulses returned to the unit by

单选题

2022-01-18 11:30

A、the tach generator
B、either the coupling or shaft
C、a small bulb attached to the shaft
D、a piece of reflective tape

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正确答案

D

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