shifter

each morning the rock-shifters travel by donkey cart to start work.

每天早晨，岩石搬运工搭着驴车去上班。

Contains symbols for VHF, UHF, and SHF circuit design, including capacitance measurers, nonreciprocal devices, modulators, phase shifters, field polarization devices, and filters.

包含用于甚高频、超高频特高频电路设计的符号，包括电容测量器、不可逆设备、调制器、移相器、场极化设备器。