机械瓣 meaning in Chinese

mechanical valves

After comparing and analyzing all kinds of valve products in world , this paper based on technology achievement of changing property by all - fix ionic pouring , overcomes faults of old valves . this paper puts out two new types valve . it improves the axis parts , and the style of the leaflet surface
本论文的研究工作是在对国内外诸多人工心瓣产品进行了深入分析和比较之后，以双叶型机械瓣为研究方向，力争克服目前使用的双叶瓣的各种弊端，以材料表面全方位离子注入改性重大技术成果为设计基础，提出了两种结构形式的双叶机械瓣。