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Shoe insert
daily wear comfort, height enhancement, plantar fasciitis treatment, arch support, foot and joint pain relief from arthritis, overuse, injuries, leg length[...]
https://en.wikipedia.org/wiki/Shoe_insert
Arch
An arch is a curved vertical structure spanning an open space underneath it. Arch can either support the load above it or perform a purely decorative[...]
https://en.wikipedia.org/wiki/Arch
Tied-arch bridge
tied-arch bridge is an arch bridge in which the outward-directed horizontal forces of the arch(es) are borne as tension by a chord tying the arch ends[...]
https://en.wikipedia.org/wiki/Tied-arch_bridge