[电子] 零电流测量 null-current measurement: 零电流测量null measurement: 平衡法测量; 指零测量null measurement of transconductance: 补偿法互导测定null method of measurement: 零位测量法;指零测量法;零差测量法photoelectric measurement by null method: 零点法光电测量下载手机词典可随时随地查词查翻译