... 3>Application:heating,lighting, 4>Grade:W1,W2,WAL1,WAL2 Tungsten wire introduction1, Diameter: 0.01mm~2.00mm 2, Grade: W1, ... special demanded. 4, Quality standard: GB/T 4181-1997(tungsten wire)ASTM B760-86 5, Specific electrical: 0.055 Ohm x ... 92-Manufacturing grid side rod of electron tube and reaming tungsten wire Certification Processing Equipment SHAANXI YUNZHONG INDUSTRY DEVELOPMENT CO.,LTD Add ...