① Mounting board: equipped with various control devices, but without operating devices and shell , users can install it in other types of control cabinets.  　　

② The on-site operation cabinet (the control cabinet is not near the drum grille) can be equipped with the following operating devices: 　　(emergency closing) button and 　　key switch: (manual)-(zero)-(automatic ) 　　rotary selector switch: forward (switch type) The zero position backward (spring type) 　　field operation cabinet (the control cabinet is not near the drum grille) can be equipped with the following operating devices: 　　(emergency opening) button and 　　key switch: (manual)-(zero position)-(automatic ) 　　forward (Switch type) zero position backward (spring type)                     　　

③ Retention post or retention ring: Install the on-site operation cabinet near the drum grille.  　　

④ The transparent protective plate on the on-site operation cabinet: used for waterproofing.  　　

⑤ In-cabinet heater of temperature control system: used to prevent condensation water in the control cabinet.  　　

⑥ Time control table: used to control the mechanical start time.  　　

⑦ Potential-free touch signal system: used to transmit accident alarm and normal operation signals.  　　

⑧ Ampere meter and cumulative mechanical working time counter: used to record current and cumulative working time.  　　

⑨ Simultaneous working control system: Synchronously control the simultaneous working of the feeding lift pump and the rotating drum grille.

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