TSL is the force needed to cause slip on the strings in the slackening heading, TST is the force needed to cause slip on the strings in the fixing course, and TW is the force needed to cause slip on the bearing surface.
TSL is the force needed to cause slip on the strings in the slackening heading, TST is the force needed to cause slip on the strings in the fixing course, and TW is the force needed to cause slip on the bearing surface.
