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relays are electrically controlled devices that open or close electrical contacts to effect the operation of other devices in the same or another electrical circuit.
继电器是一种电气控制装置,用于开启或关闭电触点,使同一电路或另一条电路中的其他设备运行。
"battery means two or more cells which are electrically connected together and fitted with devices necessary for use, for example, case, terminals, marking and protective devices.
"电池组,是指用电路连接在一起的两个或多个电池,并安有使用所必需的装置,如外壳、终端、标记和保护装置等。