“primary wave”的概念、定义、翻译、参考文献-科学参考

单词	primary wave
释义	primary wave [`prī´mer·ē `wāv] ^{COMMUNICATIONS} A radio wave traveling by a direct path, as contrasted with skips. ^GEOPHYSICS The first seismic wave that reaches a station from an earthquake.
随便看	fixed artillery fixed attenuator fixed-base index fixed-bed hydroforming fixed-bed operation fixed bias fixed-bias transistor circuit fixed-block fixed bridge fixed capacitor fixed carbon fixed-charge problem fixed contact fixed cost fixed-cycle operation fixed disk fixed echo fixed-electrode method fixed emplacement fixed end fixed-end beam fixed-end column fixed end moment fixed-feed grinding fixed field

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