tooj dag
Brass yog ib qho alloy uas muaj tooj liab thiab zinc. Brass uas muaj tooj liab thiab zinc hu ua tooj dag zoo tib yam. Yog tias nws yog ntau yam alloys uas muaj ob lossis ntau lub ntsiab lus, nws yog hu ua tooj dag tshwj xeeb. Brass muaj zog hnav tsis kam. Brass feem ntau yog siv los ua cov li qub, cov kav dej, cov tshuab cua txias sab hauv thiab sab nraud txuas cov kav dej thiab cov radiators.
