single-u butt weld single-u groove single-valued function single-valued transformation single-valved single-v butt weld single-vee groove single vernier single vortex single vortices single-way railway single-way rectifier single-way switch single-wheel pelton turbine single-whip tackle single-winding multispeed motor single window single-wire antenna single-wire circuit single-wire transmission line |
single-u butt weld челен заваръчен шев с U-образно скосяване на краищата Търсената дума е намерена |