Nws tuaj yeem txawv ntawm qhov tsos: tooj dag yog golden daj, phosphor bronze yog xim av, beryllium tooj liab yog phantom dawb, thiab tooj liab yog me ntsis ntshav.
Qhov sib txawv ntawm hardness: Phosphor tooj liab muaj elasticity zoo thiab muaj zog hardness, tooj dag muaj zoo toughness, beryllium bronze thiab liab tooj liab yog inferior nyob rau hauv elasticity thiab toughness, thiab feem ntau tsis tu ncua connector factories yuav tsis xaiv beryllium bronze thiab liab tooj liab.