spring double造句

The wheels were mounted on a leaf-spring double-bogie mounted on two axles.
It usually takes place one or two weeks before the Grand National, and for betting purposes the two races form the Spring Double.
However, due to the urgent requirement for the new tank, neither proposal was adopted, and Krupp instead equipped it with a simple leaf spring double-bogie suspension, with eight rubber-rimmed roadwheels per side.
She was well known for her difficulty and originality especially her one armed hand stand balances on beam, among this difficulty was one of the first triple twists in her 1979 European Championships floor routine and her Olympic games opening passage on floor, round-off 1.5 twisting layout immediately into a round off backhand spring double pike back.
The only thing I can think of is that there somehow is something that applies a smaller counteracting force to the gears that is just big enough to ensure that they always rotate at the same speed, but increase and decrease at the same rate as the main gear ( so if the tension in the spring doubles, the counter-acting force doubles too, but the difference between it and the main gear is constant ), but I can't quite work out the details.
It's difficult to find spring double in a sentence. 用spring double造句挺难的