loud-speaker

基本解释

The police on duty tried to shoo away the crowd by using a loud-speaker.
在值班的警员试着把人群散去，于是他使用了扬声器。
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Explosion-proof flexible connecting pipes is used in explosion-proof telephone station, explosion-proof terminal, explosion-proof loud-speaker inlet or outlet to conduit and protect the cable.
防爆挠线连接管用于防爆电话站、防爆接线箱、防爆扬声器的输入，输出口到布线钢管之间的过渡连接，起到保护电缆的作用。
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The Pioneer TS-W307F car loud speaker system support Single conex damper with damper ring, Large magnet and high-power motor assembly together with its Extended excursion design.
在先锋TS - W307F汽车扬声器系统支持单抗耐克斯减震器的阻尼环，大型磁体以及高功率电机装配连同其扩展冲程设计。

These incidents have done more than the decades of screeching by Japanese militarists with their loud-speaker vans to nudge the country into taking tougher measures to defend itself.
ECONOMIST: Japan
The Gamer may be built for fun, but it's all business on the outside -- meaning it avoids the siren call to cover itself in loud colors, over-designed speaker grills and "hardcore" accents.
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Along the bottom edge, you'll find the micro-USB port next to a single speaker that's pleasingly loud -- we only had to hit the middle settings for a decent playback volume.
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A loudspeaker is a piece of electronic equipment that forms part of a public address system and transmits sound.
A loudspeaker is a piece of equipment, for example, part of a radio or hi-fi system, through which sound comes out.