CONTACTS FOR ELECTRICAL CIRCUITS

PLATINUM, PLATINUM SHEETS, PLATINUM BARS, PLATINUM WIRE, PLATINUM ALLOYS, PLATINUM SPONGE; SILVER, SILVER SHEETS, SILVER BARS, SILVER WIRE, SILVER ALLOYS; NICKEL, NICKEL SHEETS, NICKEL BARS, NICKEL WIRE, NICKEL-CLAD STEEL SHEETS, NICKEL ALLOYS; GOLD, GOLD BARS, GOLD ALLOYS; TUNGSTEN, TUNGSTEN ALLOYS; THERMOSTATIC METAL, THERMOSTATIC-METAL SHEETS, THERMOSTATIC-METAL BARS; WIRE MADE ONE END OF PLATINUM, PLATINUM-IRIDIUM, SILVER, GOLD, OR TUNGSTEN OR ALLOYS OF THESE METALS WITH EACH OTHER OR WIT...