Chen-Tech Taiwan Industries Corporation, which undertakes upstream forging production, is the only domestic enterprise doing this work deemed qualified by the Boeing and Garratte companies of the U.S. CTTI was established in 1982 by the Science and Technology Advisory Group of the Executive Yuan.
至於從事航空工業「上游」鍛造品（金屬經初級加工而成之毛坯）生產的全特公司，則是國內唯一獲得美國波音、蓋瑞特公司驗證合格的民間廠商。