GB/T 3630-2006 Standard Nb Niobium Cake For Chemical Anti Corrosion
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...99.99 Executive standard :ASTM B393-05 or GB/T 3630-2006 Flatness requirements: Flatness (percentage)=(H/L)X100 H-- Maximum distance between standard plane and the lower surface of sheet; L-- The minimum horizontal distance between the ......
Luoyang Forged Tungsten-Molybdenum Material Co., Ltd.
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