... 2.special light: small size,little volume,easy move.3.low maintenance cost: no fragile, expensive tubes;4.special security ... , no pressure, eliminating the high risk of electric shock;5.high reliability: modular, integrated, high reliability assurance;6.simple ... of pontil, the hardening of surface for high tensile screw, epoxy powder coating for locking nut etc. low price of induction heat machine ...