East of Paris the German thrust beyond the Seine and the Marne, threatening to turn the Maginot line, appears to have made little progress.
在巴黎东部,德军试图越过塞纳河和马恩河,从后方威胁马其诺防线,但进展有限。
2
If the parting line cannot be on a single plane, then it is good practice to use symmetry of the design to minimize the side thrust forces.
如果分模面不能在单一平面,利用设计的对称性来减小侧向推力不失为一种好方法。
3
Rolling theoretical rotation axis lineof the inner ring to the center axis lineof bearings, thrust bearings on the shaft circle refers to the axis line.