This will be a trifle thicker than the course so as to allow for truing the surface of each finished course in the lathe.
A machine for truing the surfaces of wood-work that are to form a joint.
This facing head is also used frequently for truing the flanges of cylinders which are to be bored, and for similar work.
The use of airplanes in this country will require men for rigging, for truing up the wires and struts.
Special grinders are used for truing these hardened centers.
First, the bar may be set to accommodate the cylinder bore, truing it out with as light a cut as possible.
If the grindstone is turned by a belt from an engine the work of truing may be done in a few minutes.
It is also a very handy tool for truing up work on the boring mill or lathe.
Turn the coil over and work the other side together, truing up the circle and making the bottom of uniform thickness.
Continue until the panel is complete, when, after truing up, it is ready for soldering.
Old English triewe (West Saxon), treowe (Mercian) "faithful, trustworthy," from Proto-Germanic *trewwjaz "having or characterized by good faith" (cf. Old Frisian triuwi, Dutch getrouw, Old High German gatriuwu, German treu, Old Norse tryggr, Gothic triggws "faithful, trusty"), perhaps ultimately from PIE *dru- "tree," on the notion of "steadfast as an oak." Cf., from same root, Lithuanian drutas "firm," Welsh drud, Old Irish dron "strong," Welsh derw "true," Old Irish derb "sure."
Sense of "consistent with fact" first recorded c.1200; that of "real, genuine, not counterfeit" is from late 14c.; that of "agreeing with a certain standard" (as true north) is from c.1550. Of artifacts, "accurately fitted or shaped" it is recorded from late 15c.; the verb in this sense is from 1841. True-love (adj.) is recorded from late 15c.; true-born first attested 1590s. True-false as a type of test question is recorded from 1923.