How are compression springs made?
A、Theyarecharacterizedbyanarmthattangentiallyextendsfromadeadturnofoneendofthesprings
B、Theyareconstructedinaclose-coiledconditionunderaninitialtension
C、Theyareconstructedsothatwhentheyareinrelaxedstatethereisadistancebetweenthecoils
发布时间：2025-10-09 01:00:49
