... simply, the operation easy to use, to provide the vacuum quickly to return attracts the function, ... , the product necessary complete, may according to the user need, have the size different ... in a tin, can guarantee the good welding quality.Technical performance target:1. feed flow time: 0.01s-1S,0.1s-10S,0.2s-20s,0 ... output barometric pressure: 0.05 MPa 10.7 MPa;4. repeat accuracy: 0.5%;5. smallest ...