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1.The single pole-piece magnetic head is crucial for the operation of the device.
单极磁头对于该设备的运行至关重要。
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2.The engineer replaced the single pole-piece magnetic head with a new one.
工程师用一个新的单极磁头替换了旧的。
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3.The single pole-piece magnetic head was designed to improve signal strength in certain areas.
单极磁头的设计是为了在特定区域提高信号强度。