三棱尺是比例尺的一种形式。因尺的形状是一个三棱柱，故称三棱尺，是测量、换算图纸比例尺度的主要工具。同时是按比例绘图和下料画线时不可缺少的工具。比例尺上的数字以米为单位。使用比例尺上的某一比例绘图寸．可以不用计算，而直接按照该尺面所刻的数值。截取或量度线段的长度。三棱比例尺也能作定位尺，在对稍厚的弹性板材作60度斜切时非常有用。
... 条式和框式水平仪bar form and square levels 三棱尺three edges straigjht edge 刀口型直尺:knife straigjht edge ...
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... Triangle三角(形、板、铁) Triangular scale三棱尺 Triangular thread V形(三角)螺纹 ...
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... 三镜头航空摄影测量学 trimetrogon photogrammetry 三棱尺 triangle scale 三维大地测量学 three-dimensional geodesy ...
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方法采用三棱钉张力带固定尺骨、钢板固定桡骨治疗30例尺桡骨骨折，尺桡骨钛合金钢板内固定治疗25例，观察两组病例的手术时间、尺骨骨膜剥离长度和骨折愈合时间。
Methods 30 patients were treated with ulna by triangular nail and tension band and radius by plate fixation. 25 patients were treated with both ulna and radius by titanium plate fixation.
结论三棱钉张力带内固定在尺桡骨骨折的治疗中具有价格低廉、疗效满意的优点。
Conclusions Treating the diaphyseal fractures of radius and ulna by triangular nail and tension band is proved to be a good method with less expenses.
目的观察三棱钉张力带在尺桡骨骨干骨折中的治疗效果。
Objective To investigate the efficacy of treating diaphyseal fracture of the radius and ulna by triangular nail and tension band.
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