Multi-functional extraction tank, hot reflux extraction&concentration unit, minitype extraction&concentration unit, ultrasonic extraction&concentration unit, alchol recovery tower, beer fermentation equipment, reaction kettle/crystallization tank, CIP system, jacketed kettle, milk cooling tank, plate heat exchanger, pasteurization machine, filter series, falling film evaporator, forced circulation evaporator, vacuum pressure-reduced concentrator, external circulation vacuum concentrator, and kinds of stainless steel storage tank, mixing tanks, and preparation tanks.