1.   ：
• Upper and down vacuum sinks are molded by single thick stainless steel, high-density, and lower horsepower motor is saving electricity.
• Sand blasting and electrolysis processing, exterior appearance is durable and attractive.
• Using high price stainless steel wheel frame and wear-resisting PU wheel, and the back cover opens easily that it is simple to do oil-change service and maintenance for the pump. 

2.   ：
• Hit-resisting and insulation, moisture-proof, and 10 groups of touchable IC controlled memory.
• Duo-color numerical control mode, setting mode is the green and action mode is read.
• Motor overload demonstration, seal broken warming and movement unusual signal. 

3.   ：
• Top sealing section is aluminum crowding, anode lighting and corrosion prevention processing.
• Wave shape heat-resisting silica gel sealing section seals more stable and artistic. Four layers of aluminum foils bags also may be sealed tight.
• The bottom sealing section is aluminum alloy and it is invariable.
• Both copper sides have spring designed to make seal lines stronger during heating up and expansion.
• Both heat-resisting sides installed protection board to make heat-resisting cloth not wrinkle, more durable, and reduces material waste. 

4.   ：
Printing date, weight and serial number during sealing. 

5.   ：
• Double extendable springs, gland lithe, patent spring socket which release spring pin to eliminate pulling force when it is not using. So the elasticity is not easy to loose and the spring is more durable. 
• Optional equipments may be installed to make operation precisely. For example, sufficient nitrogen, vacuum degree hypothesis instrument and automatic barometric pressure lid.