6 METALLIC (NON-ELECTRIC) ARMATURES FOR COMPRESSED AIR LINES, PIPE LINES, HYDRAULIC PIPE LINES, PIPE CONNECTING PIECES, PIPE TURNS AND HOSE COUPLINGS MADE OF METAL, AND METALLIC WELDING NIPPLES, AND METALLIC SEALING RINGS AND DISCS
7 AMATURES FOR MACHINES (ALSO HYDRAULIC); VALVES AS MACHINE PARTS-NAMELY, ANNULAR, PRESSURE, PRESSURE-REDUCING, VENTING, BRAKING, CHECK AND PIPE BREAKING VALVES, AND PIPE BENDING MACHINES