Tungsten strands (spring, funnel, wavy, straight, gate, etc.) High purity aluminum wire, high purity aluminum sheet, silicon aluminum alloy wire, silver aluminum alloy wire, 310#315 tungsten boat, 310# Molybdenum boat, titanium alloy wire, high purity nickel wire, black chromium wire, white chromium wire, nickel-chromium alloy wire (2; 8 and 5; 5), iron-nickel alloy wire, chrome-aluminum alloy wire, titanium-chromium alloy wire, titanium-nickel alloy Silk, coated red copper wire, coated brass wire, magnesium aluminum alloy wire, mercury strip (chrome strip), chromium powder. 2. Environmental protection, non-conductive materials; high-purity (99.99%) indium wire and 1:9 indium tin alloy wire. 2:8 Indium tin alloy wire. Tin silver alloy wire. Environmentally pure tin wire. SGS certification. 3. Optical coating materials; silicon monoxide, silicon dioxide, titanium dioxide, zinc sulfide, German imports of colorful, colorful black powder, magnesium fluoride, magnesium oxide, zirconium dioxide, aluminum oxide, crystal film. 4. Various vacuum gauges (metal, glass, flange interface ZJ-2, ZJ-10, ZJ-27, ZJ-51.ZJ-52.ZJ-53.ZJ-54). Wholesale No. 30 and No. 80 Vacuum sealed mud, No. 1 No. 2 No. 3 No. 4 Kunming vacuum sealing, 7501 high vacuum grease. Cleaning coating equipment caustic (imported, domestic). Imported, domestic water-based dyeing toner, filter paper, sales of new custom specifications vacuum coating machine, vacuum coating machine parts, high temperature silicone seals, peripheral equipment, vacuum coating machine maintenance, maintenance, high recovery of waste tungsten wire.