本系列产品的操动机构为弹筑簧储能式，可以用交流或直流操作，亦可用手动操作。
It's operation structure is spring store type, can using AC or DC operate, and also can use handle operation.
本系列产品的操动机构为弹簧储能式，可以用交流操作，亦可用手动操作。
Operating machine of the type products is spring energy storage type, it can be AC operated, also operated by hand.
本系列产品的操动机构为弹簧储能式，可以用交流操作，亦可用手动操作。
Operating machine of the type products is spring energy storage type, it can be AC operated, also operated by hand.
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