It's named a T-sq. for any reason. The sq.’s scale has to be affixed to the T-head precisely perpendicularly. You can’t attract parallel and perpendicular strains nicely until the main scale along with the T-head are at proper angles. Considering the cross-area, the two aspects of the “L” are called https://josueoxejp.digitollblog.com/32039742/magnetic-lock-pin-fundamentals-explained