Official Answer
Answer
Sous vag mande pou sifas paralèl ki plat pou distribye chay la respire sou tout krèt vag yo. Si sifas kwazman an se konkav, dyamèt enteryè sezon prentan an ap chaje plis pase dyamèt ekstèn lan, kreye yon moman ki ka lakòz sezon prentan an tòde. Paralèl la ta dwe nan $0.02$ mm pou chak $25$ mm. In many automotive clutches, hardened and ground shims are placed between the wave spring and cast-iron housings to provide a suitable mating surface and prevent the spring from 'digging' into the softer material.
