fabric heat welding machine 1.three standard model sizes 2.5m,3.0m,4.0m or ... welding function conversion.Features:1> welding by Heat and Impulse2> three standard model sizes: 2.5m,3.0m,4.0m (or ... hot melt adhesive article between fabrics.6> working processes only three steps: power on →welding→finish, welding time 15-22sec.7> welding ...