1. Set screws use stainless steel material, so screws wont rust off and cause electrical short which extends service life of machine.
2. Baseboard of inner circuit board uses simple brass and protection cover, which is effective protection to antijamming of circuit and ground connection.
|Supply voltage||~220V 50HZ|
|Range of neg-pressure||-50~0kPa|
|Range of pos-pressure||0~50kPa|