Acta Technica 105. (1993)

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ACTA TECHNICA A JOURNAL OF THE HUNGARIAN ACADEMY OF SCIENCES CENTRAL EDITORIAL BOARD T. CZIBERE, K. GEHER, L. KOLLÁR, P. MICHELBERGER (EDITOR-IN-CHIEF), A. LÉVAI, J. PROHÁSZKA, K. REMÉNYI, J. SZABÓ, GY. CZEGLÉDI (MANAGING EDITOR) EDITORIAL COMMITTEE FOR ENERGY ENGINEERING (SERIES E) G. BÜKI, GY. CSOM, K. GEHER, T. JÁSZAY, I. KRÓMER, K. REMÉNYI (CHAIRMAN), G. SZABOLCS Ada Technica publishes original papers, preliminary reports and reviews in English, which contribute to the advancement of engineering sciences. Ada Technica is published by AKADÉMIAI KIADÓ Publishing House of the Hungarian Academy of Sciences H-1117 Budapest, Prielle K. u. 19—35 Orders should be addressed to Subscription information AKADÉMIAI KIADÓ H-1519 Budapest, P.O. Box 245 Subscription price for Volume 105 (1993) in 4 issues US$ 80.00, including normal postage, airmail delivery US$ 20.00. Ada Technica is abstracted/indexed in Applied Mechanics Reviews, Current Contents-Engineering, Technology and Applied Sciences, GeoRef Information System, Science Abstracts. © Akadémiai Kiadó, Budapest