Zund abẹfẹlẹ Z31 ti ṣe ti olekenka-itanran tungsten irin lulú. Tungsten irin (alupupu lile) ni lẹsẹsẹ awọn ohun-ini ti o dara julọ gẹgẹbi lile lile, resistance resistance, agbara ati lile, resistance ooru ati ipata ipata, paapaa lile giga rẹ ati resistance resistance. Carbide jẹ lilo pupọ bi awọn ohun elo, gẹgẹbi awọn irinṣẹ titan, awọn gige gige, awọn apẹrẹ, awọn adaṣe, awọn irinṣẹ alaidun, bbl