Tungsten, molybdenum, tantalum na niobium bụ ihe dị mkpa maka ụlọ ọrụ ụgbọ elu na nchekwa n'ihi ihe onwunwe ha: nkwụsi ike dị elu nke okpomọkụ, njupụta na ike ike, ihe onwunwe ha magburu onwe ya, na nchebe radieshon.
Ngwaahịa na-ekpo ọkụ maka ụgbọ elu na nchekwa
Tungsten nozzle
Molybdenum ịkpọpu Mandrel