Tender For tender for supply of coal lab equipment spares -muffel furnace ssr 40 amps dc to ac , hot air oven 1/35 hp motor with ss blade , muffel furnace coil with muffl 5x5x10 , muffel furnace coil refra chmbr 4x4 x9 , hot air oven digital controller , muffel furnace coil with ref chamber