42 Custom design and engineering of environmental control apparatus, steam and hot water boilers, kitchen equipment, laundry machinery, lighting and lighting accessories, hotel equipment, movable walls, walls which are used in banquet halls and convention centers, piping and valves and architectural hardware, ironmongery and electronic and mechanical locks; Product development services and product development consulting services, Engineering design services in the field of environmental control apparatus, steam and hot water boilers, kitchen equipment, laundry machinery, lighting and lighting accessories, hotel equipment, movable walls, walls which are used in banquet halls and convention centers, piping and valves and architectural hardware, ironmongery and electronic and mechanical locks