... 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-weight Materials.· Applied the large ... ,such as tent,seating,buff,harness,jute bag,automobile top,water-proof cloth,bags,etc..