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Na7 Spiral Wave Nb9 Stranded Wire 0.5mm 99.95% PVD Evaporation Heater, Find Details and Price about 99.95% Tungsten Wire High Purity Tungsten Wire from Na7 Spiral Wave Nb9 Stranded Wire 0.5mm 99.95% PVD Evaporation Heater - Sichuan Yushi Electronic Materials Co., Ltd.