查询词典 persistent wave

P wave; Primary Wave：初波

"Pn layer","Pn层(地函最上层)" | "P wave; Primary Wave","初波" | "P-P boundary","P-P界"

prime cost sum：成本额

primary wave, P-wave 初波,P波 | prime cost sum 成本额 | primer 底漆

progressive wave：行波

progressive wave motion 前进波动 | progressive wave 行波 | progressive winding 前进绕组

progressive wave tube：行波管

progressive wave antenna 行波天线 | progressive wave tube 行波管 | projection 投影

progressive wave aerial：行波天线

progressive scanning 顺次扫描 | progressive wave aerial 行波天线 | progressive wave antenna 行波天线

progressive wave motion：前进波动

progressive trials 逐级加速试航 | progressive wave motion 前进波动 | progressive wave 行波

pulse wave：脉冲波

接下来再来了解一下方波(Square Wave)和脉冲波(Pulse Wave). 方波,因为波形方方正正而得名. 而脉冲波. 波形上下最大振幅持续时间完全相同,而单独又称为方波. 也就是说波形上下最大振幅持续时间只要不相同,就是脉冲波.

pulse wave：脉波

pulse valve 脉冲阀 | pulse wave 脉波 | pulse wave 脉波脉冲波

radio wave spectrum：无线电波谱

radio wave propagation 无线电波传插 | radio wave spectrum 无线电波谱 | radio waves 无线电波

radio wave holography：无线电波全息学

radio telescope 射电望远镜 | radio wave holography 无线电波全息学 | radio wave propagation 无线电波传插

phenol red：酚红,苯酚磺酞

phenol reagent 酚试剂 | phenol red 酚红,苯酚磺酞 | phenol red test 酚红排泌试验

accessory equipment：附件

accessory equipment 辅助设备 | accessory equipment 附件 | accessory part 附件