电子照相投影复印机
electrophotographic projector printer
速度投影定理
theorem of projection velocities
随机投影聚类
random projected clustering
缩图光学投影系统
pantograph optical projection system
POPs
缩图式电子束投影
demagnifying electron projection
缩小式电子束投影系统
reducing electron beam projection system
台式轮廊投影仪
table model profile projector
特宽角多倍投影测图仪
superwide-angle multiplex
特殊投影法
special projective m ethod