phototachometer
/ˌfəʊtəʊtaˈkɒmɪtə/ /ˌfəʊtəʊtəˈkɒmɪtə/noun
An optical device for measuring the speed of rotation of a part.
Origin
Late 19th century (in an earlier sense). From photo- + tachometer.
| 单词 | phototachometer |
| 释义 | phototachometer/ˌfəʊtəʊtaˈkɒmɪtə/ /ˌfəʊtəʊtəˈkɒmɪtə/noun An optical device for measuring the speed of rotation of a part. Origin |
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