Cov lus piav qhia luv luv:

Constantan hlau rau cov qauv resistor yog tooj liab-nickel feem ntau muaj 55% tooj liab thiab 45% npib tsib. Nws lub ntsiab tseem ceeb yog nws txoj kev tiv thaiv uas yog tas li ntau qhov kub. Nws tseem hu ua Alloy 294, Nico, Nico, Nico, Copel, Alloy 45, Neutrology, Cuni 44, CN49.