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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Therefore, it is a key of design the verdant forage harvesting machine that rational design mince-drum and motion-blade.

因此对切碎滚筒及动刀片的合理设计，是青饲机设计的关键。

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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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