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Due to circumferential action of the spiral in a spirally reinforced column
The maximum efficiency of spiral gears is (where $$\theta $$ = Shaft angle and $$\varphi $$ = Friction angle)
In leaf springs, the longest leaf is known as
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
The springs in brakes and clutches are used to