... 1. circles the filament core , the support wire , the lead-out wire ,the electronics grid and so on2. the ... , the lead -out wire guide rod, the electrictity vacuum components ,the heater elments .the high temp electric resistance furnace ... and so on3.molybdenum wire for EMD wire cutting ,high tensile strength ,smal elongation ratio good stability ,high cutting precision molybdenum wire ,heating wire