The test paper strip mainly comprises a sample pad, a binding pad or a binder release pad, an analyzing membrane, a water absorbing pad and a plastic back plate.
其结构主要包括：样品垫、结合垫或结合物释放垫、分析膜、吸水垫和塑料背板。
A sound-absorbing pad on top vibrates when sound waves hit it, causing the tiny zinc oxide wires to compress and release.
顶部的一个吸音垫在声音到达时发生振动，促使微型氧化锌绳伸缩。
A sound-absorbing pad on top vibrates when sound waves hit it, causing the tiny zinc oxide wires to compress and release.
顶部的一个吸音垫在声音到达时发生振动，促使微型氧化锌绳伸缩。
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