75 / | HD | SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES |
330 | DF | PROCESSES {9} |
388 | DF | .~ Preparing for amalgamation, preparing and amalgamating, or breaking amalgam to produce free metal {3} |
389 | .~.~ And displacing with a metal other than Mercury(Hg) |