propeller boss meaning in English

车叶毂
螺旋桨毂
推进器毂

Scraping of propeller boss
螺旋桨锥孔修正
In the first part , firstly , the main dimensions of oar blade and propeller boss and other parameter of varivec propeller are selected . then , a suit of viable mechanism to control the work state of varivec propeller is designed , which is different from the mechanism designed by the japanese . it ' s principle is similar with the cycloid propeller
在机构设计部分，本文首先确定了全方位推进器的桨叶及桨毂的主尺度以及其他的相关的参数，然后设计出一套可行的与摆线推进器工作原理相仿的调距机构用来对全方位推进器的工作状态进行控制，该机构与日本的全方向推进器的连杆圆盘机构完全不同。