Simple cleaning. Test sewing completed. Industrial sewing machine Brother Nouvelle Couture TA3-B627 With a wide table and Knee lifter. Please see the images! Using #30 thread, First... plain fabric Then... leather folded four times. Penetrates easily♪ As expected of an industrial sewing machine! Even thick materials that are difficult for home sewing machines Leave it to me! There are scratches, stains, discoloration, rust, peeling, etc., but the sewing is still going strong. (Please check the images.) *To prevent trouble, I will ship it with the thread threaded as shown in the images and with some thread remaining. For those who understand, please purchase.