水剂清洗剂
water aqua cleaning agent
有机溶剂清洗剂
organic cleaning solvents
调频音频电报
FMVFT Frequency Modulated Voice Frequency Telegraph
modulation
frequency VFT
视频音频采集
video and audio data collection
视频音频集成操作
VAIO Video Audio Integrated Operation
移频音频电报
FSVFT Frequency Shift Voice Frequency Telegraph