tender for operation and maintenance of vacuum heat treatment furnaces, spinelling facility, electroplating and painting processe:-, vacuum heat treatment , spinelling treatment , cadmium plating process cycles , alkaline copper plating process cycles , acid copper plating process cycles , normal anodizing process cycles , hard anodizing process cyles , electrolytic nickel plating process cycles , electroless nickel plating process , zinc -nickel alloy plating process , silver plating process cycles , spray and brush painting process cycles , operation of salt spray test chamber , operation of environmental test chamber , cleaning and maintenance of sputtering equipment , cleaning and maintenance of passivation equipment , changing and maintenance of pre-cleaning solution before passivation , buffing and ultrasonic cleaning of jobs , genration of dm water