分析齿轮主要参数，提出用测量跨棒（）和公法线长度计算斜齿圆柱齿轮螺旋角的测绘方法，并推导出螺旋角的计算公式。
In this paper calculating method of lead angle of helical gear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.
它包括地籍测量，水道测量，海洋测绘，并在土地管理和土地利用管理中发挥了重要作用。
It includes cadastral surveying, hydrographic surveying, and ocean mapping, and it plays an important role in land administration and land use management.
地形图的测绘和应用是普通测量学的核心内容之一。
Topographic mapping and application of an ordinary surveying one of the core content.
应用推荐