Class 463.aAids to drawing for process work (used by lithographers and draftsman). Grained and embossed papers. ... Class 470.aMachines used in Various manufacturing industries not specifically mentioned. Class 471.aFor testing the strength of ... Rolling mills and forgesaRoll trains, hammers, squeezers, engines, boilers, and other driving power: heating ... 4th. Will feed from 15 to 65 gallons an hour. 5th. Will Work when hot as well as cold. 6th. Water when fed to boiler is at aanbsp;...