... ,automobile top,water-proof cloth.. SPECIAL FEATURES AND APPLICATIONS· Single Needle,Top & Bottom Feed,Flatbed,Lockstitch Machine For Extra ... Heavy-weight Materials. TY-1801 Single Needle,Bottom Feed,Flatbed,Lockstitch Machine For Ordinary Heavy- ... the upper & lower sewn materials,ensures the prefect & fine seams.Suitable for stitching all the extra heavy-weight materials ...