按钮开关switchbutton,简称sb.
access control emergency door release key switch button with red
出门 按钮出门开关开门按钮门禁按钮电锁按钮 mini button switch
abs plastic push button foot switch foot control switch for fan
非接触开关按钮 86出门按钮 触摸门锁按钮 button switch
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