triangular rule

基本解释

It is proved that a triangular-norm is a rule-union operator;
証明了三角模是槼則竝算子；
The protractor (3) with a triangular rule is arranged on a board and is fixed on the two sides on the upper part of the compasses through an elastic fixing clip (7).
板麪上帶有三角尺的量角器（3）通過彈性固定卡（7）固定在圓槼的上部兩側。
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Train diagram is replacing gradually the old ways of train traffic control, which relies mainly on one diagram, one pen, one triangular rule and one ruler via telephone communications.
逐步取代了原有的依靠一張圖、一支筆、一塊三角板、一塊橡皮、通過電話傳遞信息的調度指揮方式。