the use of optical vortex beams with a doughnut-like shape in the cross-section to form an optical vortex pipeline;
运用了截面为甜甜圈状的涡流光束形成的光涡流通道;
2
If the geometry is encoded in the ESRI shape format, it actually requires 3.1 MB of disk space (see the Resources section for more information on ESRI shape format).