摘要
近年来,直升机作为一种现代化的交通工具,正越来越受到世界各国的重视。本文介绍了当前直升机的国际市场状况,以及一些新的技术和新的产品。
In recent years, helicopters as a modern vehicle are arousing more and more attention in the world. This paper presents the international market of helicopters and some new techniques and products.
