Main disadvantages of the technology of making various graticules used for planetarium are summarized. A new method is given.
本文总结了过去天象仪上所用各种分划板的加工工艺的主要缺点，提出了新的加工方法。
The relative location of rock mass structural plane and slope is analyzed by graticules. The influence to the slope stability is judged.
指出利用经纬线投影网可以分析岩体结构面与边坡的相对位置，从而判断它们对露天矿边坡稳定性的影响。
The relative location of rock mass structural plane and slope is analyzed by graticules. The influence to the slope stability is judged.
指出利用经纬线投影网可以分析岩体结构面与边坡的相对位置，从而判断它们对露天矿边坡稳定性的影响。
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