Two self-reset buttons with two normally open contact.
Y.为带4个常开触点的自动复位按钮。Self-reset buttons with four normally open contact
Z.电源程序开关，中间断开，左右均接近，可作消防开关。Power-source programmed switch can cut off in between and cut in both the left and right which can be used as extinctive switch.
a.用于起动，点动混合电器。For starting and crawl mixed electric appliance.