... light: small size,little volume,easy move.3.low maintenance cost: no fragile, expensive tubes;4. ... heating process for stainless steel tube, cramp iron, epoxy powder coating for steel tube, the hardening for the ... elevator pulley and shaft, the welding of steel tube, tube bending etc.4.Hardware: the pre-forging ... powder coating for locking nut etc. low price of induction heat machine for gold melting