The theory of noise attenuation by patterns is the same whether applied to the shot or the geophone end of the wave trajectory . 应用组合方法压制噪声的原理,不论对炮点还是对栓波器波的轨迹终端都是一样的。
Specification for thyristor chopper of trolley bus 无轨电车晶闸管斩波器技术要求
Principle and design of a chopper applied in smes 超导储能系统用斩波器的原理及设计
Technical requirement and test method of optical interleaver 光梳状分波器技术要求及测试方法
Specification for line traps for power line carrier systems 电源线载波通信系统用线路陷波器规范
Test of optical multiplexer of multi - layer dielectric film filter 多层介质膜滤波器型光合波器测试
Line traps for a . c . power systems 交流电力系统用的线路陷波器
Two - quadrant current chopper control for brushless dc motor 电流型两象限斩波器控制的无刷直流电动机
Optical couplers wdm over two wavelength 光分波合波器多波长
Process of etched - grating demultiplexer based on silicon - on - insulator 材料的刻蚀光栅分波器的制作工艺