The first method is that, the task of vibrating bellows is accomplished by a single hand when another hand is pressing the keys.

震风箱大致分为三种不同的奏法：第一种方法是，在单手按键时，我们用另一只手来完成震风箱的任务。

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The first method is that, the task of vibrating bellows is accomplished by a single hand when another hand is pressing the keys.

震风箱大致分为三种不同的奏法：第一种方法是，在单手按键时，我们用另一只手来完成震风箱的任务。

youdao