11. Japan has specific rules about producing airsoft guns with metal parts . 12. The wooden framework was cleaned, and corrosion on metal parts removed. 13. The songs alternate between harsh death metal parts and more serene, smoother passages. 14. The metal parts , he explained, would not have burned during the cremation process. 15. Precision makes metal parts for aircraft engines and produces turbine blades. 16. Metal parts are either nickel or treated with non-corroding metal enamel.17. Consequently, regulators have focused on reinforcing metal parts instead of the rubber tires. 18. The company makes motors from industrial plastics, rather than from stamped metal parts . 19. This led to the development of several machine tools for cutting metal parts . 20. The lighting was replaced and the metal parts of the shed were painted.