基于IPsec的VPN的应用
the application of virtual private network which is on the basis of IPsec
带角圆的锥面铣刀
conical milling cutter with an angular circle
带周期裂纹的圆形孔洞
circular hole with periodic straight cracks
宽带圆形阵列天线
broadband circular array antenna
末端带类球面微透镜的锥形光纤耦合头
tapered end fiber couplers tipped with quasispherical microlens