双目棱镜放大镜
binocular prism magnifier
吉尔伯特电流放大单元
Gilbert current amplifying unit
差分－运放放大电路
differential-operational amplify circuit
瓷座放大镜
magnifying mirror with ceramic foot
大孔径放大镜
wide-aperture optical magnifier
大气压对应投影透镜放大率校正系统
magnification correction system for atmospheric pressure
带放大镜高度尺
height gage with magnifier