It contains a telescope, a compass, and a protractor, and it's used to measure horizontal and vertical angles.
一个指南针，一个测角器，它用来测量水平和垂直的角。
According to the structural design scheme for horizontal shafting of a large-aperture telescope, the structural analysis model is established by means of the structural analysis software I-DEAS.
根据某大口径望远镜水平轴系的结构设计方案，利用结构分析软件I - DEAS，建立了结构分析模型，求得了水平轴系前几阶固有频率和振型图。
According to the structural design scheme for horizontal shafting of a large-aperture telescope, the structural analysis model is established by means of the structural analysis software I-DEAS.
根据某大口径望远镜水平轴系的结构设计方案，利用结构分析软件I - DEAS，建立了结构分析模型，求得了水平轴系前几阶固有频率和振型图。
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