Ko te Tungsten, molybdenum, tantalum me te niobium he mea tino nui mo te umanga rererangi me te arai na runga i o raatau taonga: te pumau o te pāmahana teitei, te kiato me te kaha tensile, o raatau miihini pai rawa atu, me te tiaki radiation. Nga Hua Wera mo te Rererangi me te Tiaki Nozzle Tungsten Molybdenum piercing Mandrel