【摘要】 齿轮技术发展总的趋势是优质化。此总趋势可按不同的环节（材料的选择、设计、制造和技术管理）和不同的层次（如设计环节：从大尺寸化，到强化，到优化）分解为许多具体的发展趋势。某一机器的齿轮具有哪些特有的发展趋势，视此类机器不同的发展趋势和市场需求而定。更多还原

【Abstract】 The general trend of gear technique is to obtain good-quality, which may be divided into many concrete trend by various links (selecting material, design,manufacture and technical management) and by various levels (e. g. design link:from large-size to strengthen and to optimize). There are specific trend of gear used to a machine,according to various trend of this kind machine and market’ S demands.更多还原