电容单位换算

{"f":{"label":"法拉","symbol":"F","factor":1},"mf":{"label":"毫法","symbol":"mF","factor":0.001},"uf":{"label":"微法","symbol":"μF","factor":1.0e-6},"nf":{"label":"纳法","symbol":"nF","factor":1.0e-9},"pf":{"label":"皮法","symbol":"pF","factor":1.0e-12}}