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One hearing aid of hearing aid of the method that microphone and operation are automatically regulated with one with an adjust automatically microphone
One hearing aid of hearing aid of the method that microphone and operation are automatically regulated with one with an adjust automatically microphone
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机译:带有自动调节麦克风的麦克风和操作自动调节的方法的一种助听器
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摘要
A chair comprises a unitary seat and lower back and a separate upper back mounted on the lower back to tilt backward from a yieldably restrained, relatively upright position by at least one resilient articulating linkage. The chair may also have a second seat component nested in and slidable forward and backward on the seat portion of the unitary seat and lower back.
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