... , tungsten-thorium rods, tungsten-cerium rods, tungsten-lanthanum rods, tungsten-zirconium rods and rods in various other specifications.Applications:1) Pure ... cathodes, transmitting rods, heaters, high temperature resistant molybdenum foil6) Tungsten-zirconium rods: electron tube cathodes, transmitting rods, heaters, high temperature resistant ...