| 单词 | mach number |
| 释义 | > as lemmasMach number Mach number n. (also †Mach's number) [after German Mach'sche Zahl (J. Ackeret 1929, in Schweizerische Bauzeitung 12 Oct. 179)] a dimensionless number representing the ratio of the relative speed of a body and a fluid (esp. the air) to the local speed of sound in the fluid.extracted from Machn.< as lemmas |
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