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1. The contact pointer is used to indicate when the device is in contact with a surface.
接触指针用于指示设备与表面接触时。
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2. The engineer used the contact pointer to troubleshoot the circuit.
工程师使用接触指针来排查电路问题。
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3. The contact pointer was designed to minimize the risk of electrical shocks during the installation process.
接触指针的设计旨在在安装过程中最小化触电风险。