... bar. To read the tool, note how many inches, tenths (or .100) and fortieths (or .025) the 0 mark on the vernier is from the 0 mark on the bar; then note the number of divisions on the vernier from 0 to a line which exactly coincides with a line on... The Starrett Book for Machinists' Apprentices - Σελίδα 22 των Howard Parker Fairfield, Carl Stephen Dow - 1917 - 184 σελίδες Πλήρης προβολή -
|