Control Cabinets

https://wiki-burner.win/index.php/How_Did_We_Get_Here%3F_The_History_of_Electrical_Cabinets_Told_Through_Tweets

The trolley is geared up with an independent PLC to regulate the walking of the cart, the opening and also closing of the spreader, and so on, to ensure that the cart makes up an independent intelligent control