Portable and intelligent instructments are easy to operate, light, handy, and battery powered.
便携式智能仪器应具有操作简单、小巧轻便、电池供电等特点。
It also powers the system if you choose to operate without a battery.
如果您选择不使用电池，它也可以供电给系统运作。
It also powers the system if you choose to operate without a battery.
如果您选择不使用电池，它也可以供电给系统运作。
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