Open-Sounding room: This type of room is usually quite large and is the key to a big exploding drum sound.

混响室：这种类型的房间通常很大而且是使鼓声爆发的关键。

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This article analysed the loads of the drum brake and built the key brake's mechanical model.

通过对鼓式制动器的受力分析，建立了其关键受力部件的力学模型。

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Belt conveyor is the major transportation equipment in coalmine production, and driving drum is it's key component.

带式输送机是煤矿生产中的一种主要的运输设备，传动滚筒是其关键部件。

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