middle latitude

Discuss the relationship between Mercator sailing and middle latitude sailing;

墨卡托航法与中分纬度航法的关系

Study to improve middle latitude sailing;

关于航迹计算中分纬度求经差法(英文)

The production mode with high aluminum level,general molecular ratio,low electric voltage and strengthening corner insulation could overcome the negative inflence that high aluminum level brought completely.

采用高铝水平、中分子比、低电压的生产模式并加强角部保温,完全可以克服高铝水平带来的负面影响。