调焦机构 meaning in English

focusing mechanism

There are two kinds of space mechanism included in the research of this dissertation . one is the adjustment mechanism of the imaging lens ' s focal length of a space solar telescope , the other is deployable space structure
可动结构包含的范围很广，本文主要针对两种类型的可动结构进行研究： ( 1 )空间太阳望远镜成像镜调焦机构； ( 2 )空间可展开结构。
The work of the adjustment mechanism is a project which is supported by the state committee of " 863 " . three design mechanisms are proposed , bearing and screw style , movable bearing style mechanism and assembly style mechanism . it is difficult for the precision of the mechanism made of movable bearing to meet the requirements of the design because the bearing must be made individually
空间太阳望远镜成像镜调焦机构的设计是在国家“ 863 ”高科技课题中展开的，本文有创建性的工作是根据设计要求提出了三种机构设计形式，包括直线轴承式、移动滚珠式和装配直线轴承式，比较了三种机构各自的优缺点，并根据其中的一种加工制作了实际模型。