On receipt of orders from designated person in authority, destroy typewriters as completely as time, means, and personnel permit. Priority will be given to the obliteration or destruction of all unit identification lettering or markings, all serial numbers, and all manufacturer's nameplates. Smash typewriters and components with a sledge or other heavy instrument ; burn with kerosene, gasoline, fuel oil, flame thrower, or incendiary bomb; detonate with firearms, grenades, TNT, or other explosives. In the absence of other means, bury, sink, or scatter parts and components.