trampoline coil spring for a trampoline found on airtrampolines
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Coil Springs vs Leaf Springs - Research the Spring System before Buying Your Trampoline

The History of Coil Springs in Trampolines Today you have a choice to buy a trampoline designed with coil springs vs leaf springs. The first modern trampoline was built in 1936 using coil springs attached to an iron frame and a canvas mat with…