A percussion instrument consisting of a piece of metal in the shape of a tri Angle open at one Angle.
三角铁一种打击乐器，由一块三角形的金属构成，在三角形的一个角开口。
Based on the 3d data of vertex, edges and planes, which are obtained from the tri Angle projection of a plane body, the calculation method of the plane body formation is hence worked out.
提出一种以从平面体三面投影中“提取”顶点、棱线和棱面三维信息为基础，得出平面体“构型”的计算方法。
This is commonly referred to as the Tri-Angle of combustion.
这是通常所说的氧化三角关系。
Then these risk elements is denoted with tri-angle fuzzy number, and the risks value of all schemes are evaluated by the model combined fuzzy set theory and AHP.
基于方案风险数据实际，利用三角模糊数表示因素风险，结合模糊集理论和层次模型评判了各方案的风险大小；
Then these risk elements is denoted with tri-angle fuzzy number, and the risks value of all schemes are evaluated by the model combined fuzzy set theory and AHP.
基于方案风险数据实际，利用三角模糊数表示因素风险，结合模糊集理论和层次模型评判了各方案的风险大小；
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