"Metal working shop" means a small-scale commercial establishment that sells metal articles produced by skilled manual work on the premises. This term shall include establishments that produce knives, horseshoes, hand tools and similar metal articles. The term shall not include welding shops, fabrication shops, forge and foundry uses, and general manufacturing uses. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003).