抗噪声传声器
antinoise microphone
noise-cancelling microphone
振动噪声传递
vibration noise transmission
泵传动部件位置
pump drive component location
泵传动齿轮箱部件
pump drive gearbox component
泵传动齿轮箱故障检查排除
pump drive gearbox troubleshooting
泵传动齿轮箱驱动带轮
pump drive gearbox drive sheave
泵传动齿轮箱驱动皮带
pump drive gearbox drive belt