Beamonn.比蒙beamvi.微笑；发光vt.播送；发射；用梁支撑n.桁条；光线；(光线的)束；(横)梁beam production束流产生beam scattering波束散射beam rider mode波束制导方式beam pulse rate束流脉冲重复率beam structures梁结构beam extraction束笼出beam index tube束引示管beam micrometer可换尺杆千分尺beam divergence光束发散,电子束发散,射束发散beam shape loss波束形状损耗