AECMA PREN 3338-1988 航空航天系列.铝合金(7050)具有边缘粗颗粒控制挤压棒和型材a或直径D小于或等于130 mm
Aerospace Series Aluminium Alloy (7050) Solution Treated and Artificially Aged (T74511) Extruded Bars and Sections (a or D) Less Than or Equal to 130 mm with Peripheral Coarse Grain Control Issue P 1