Advantages：
1.Air pressure type, labor saving, large area of welding and high tensile strength.
2.Easy operation, stable high frequency, does not harm mold.
3.No high frequency leakage problem.

Applicable products：
1.All kinds of canvas products welding, folding edges with tubes.
2.Welding of multiform apprentice.
3.Welding and sealing for various opening of the P.V.C.container.