The moving theory of four bar linkage is often used to analyze the triangular arm unloading mechanism of dump truck.
重型自卸汽车设计中经常选用三角臂组合式倾卸机构，应用的是铰链四连杆机械运动工作原理。
A triangular cloth is used to fix the arm in position. The bandage also holds the dressing in place.
一块三角型的布可以用来固定手臂的位置，绷带也可以把纱布固定住。
Marshal Saxe wished to arm the French cavalry with a blade of a triangular cross section so as to make the use of the point obligatory.
萨克斯元帅希望给法国骑兵装备剑刃三角截面的剑，使士兵只能刺击。
Marshal Saxe wished to arm the French cavalry with a blade of a triangular cross section so as to make the use of the point obligatory.
萨克斯元帅希望给法国骑兵装备剑刃三角截面的剑，使士兵只能刺击。
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