... 磁带脱磁设备 Demagnetizing apparatus for magnetic tapes 传话筒 Speaking tubes 电子监听仪器 Monitoring apparatus, electric ...
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speaking-tubes 传话筒
N a tube or pipe for conveying a person's voice from one room, area, or building to another 房间与房间、建筑与建筑之间的通话管
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