Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (9): 234-237.
• Research paper • Previous Articles
GAO Juxian ZHANG Ke ZHENG Zhemin Institute of Mechanics,Academia Sinica,Beijing,China GAO Juxian Associate Professor,Institute of Mechanics,Academia Sinica,Beijing 100080,China