1.crucible melting furnace, 2.for aluminum, copper, zinc,etc. 3.melting, holding Big well type H/T furnace1. heat energy :electricity2.popuse:mainly used to some big work pieces,such as shafts ,rods and gears for H/T of quenching ,temping ,forging,annealing ,carbon penetrating etc3.temperature control : PID4.Use Conditions : 1)the elevation is not more than 1,000 meters; 2)Relative humidity not ...