Shanghai Junjingsai manufactures high-performance Radio Frequency (RF) welding machines designed for the outdoor amusement and sports industry—delivering 100% airtight and watertight seam welds for inflatable water toys, lifesaving supplies, waterproof dry bags, collapsible fishing buckets, rafting boats, beach chairs, tent ceilings, ball panels, ice/hot therapy collars, and liquid-cooled garment bladders.