a
  • Alfa：钨丝, 0.375mm (0.015in) 直径, 退火, 99.95% (metals basis)
  • Alfa：钨丝, 0.375mm (0.015in) 直径, 退火, 99.95% (metals basis)
b

Alfa：钨丝, 0.375mm (0.015in) 直径, 退火, 99.95% (metals basis)

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