When designing the circuit the frequency of the carrier wave was chosen as 38K according to the physical property of the infrared sending tube.
根据红外发射管本身的物理特性，选用载波信号的频率为38K，设计制作出一种红外遥控器系统。
2
Of the problems of tube wear with powder, the influence of particle size, concentration and pressure of carrier gas on erosion was studied.
在粉料输送管道磨损问题中，研究了粉料粒度、输送浓度和输送气体压力对磨损量的影响。
3
Researched on the oil tube creep mechanical property of diesel carrier engine, supply the viscoelasticity mechanics parameter for development of new style oil tube stuff.