Helical gear\helical_03.mdl ............\helical_03.mdl.autosave ............\helical_03_fig.mdl ............\helical_gear.mdl ............\pro1.asv ............\pro1.m ............\spur_gear_design.mdl ............\std_calc_helicalgear.mdl ............\std_calc_spurgear.mdl Helical gear