variable-reluctance的用法和样例：
词汇搭配
- variable reluctance pickup 可变磁阻拾音器...
- variable reluctance 变磁阻的
- variable reluctance cartridge 可变磁阻拾音器心座...
- variable reluctance detector 可变磁阻检波器...
- variable-reluctance microphone 变磁阻微音器...
- variable-reluctance seismograph 变磁阻地震仪...
- variable reluctance microphone 变磁阻传声器...
