He mea hanga ā mātou maripi tapahi pepa ā-ahumahi ki te maitai tungsten, ā, he pai mō ngā taiao tapahi tere-rahi. He tino pakari, he ātete hoki ngā mata ki te kakahu, ā, ka taea te tu atu i ngā wā roa o te mahi tonu. Ka tukuna e rātou he tapahi tino tika, he tapahi ma, he āhua kore-pū, ka whakapai ake i te pai o te whakaputa me te whakaroa i te roa o te mahi. He pai mō ngā momo taputapu tapahi i roto i te umanga takai pepa, inā koa mō ngā raina whakaputa pepa tere-rahi me ngā raina whakaputa aunoa e tono nui ana ki te whakaputa.
