... requirements.7 Quality standard: GB/T 3875-2006 (tungsten plate)8 Production process:Materials--hot rolling--annealing--cold rolling ... cold mill, vacuum annealing furnace , W43G series straightened, hydraulic plate shears , water jet, wire cutting machine, flat-stone mill10 ... tungsten sheet is widely used in reflection shield, cover plate applied in the sapphire growth furnace, reflection shield, ...