GearJunkie on MSN
The Best Ski Helmets of 2025-2026
Our experts tested and found the best ski helmets including Smith, Pret, Giro and more. Whether you're carving at the resort ...
Abstract: Transparent metasurface-loaded flexible antenna for the X band. The dumbbell-shaped metasurface is a type of polarization conversion unit arranged in a checkerboard pattern. This structure ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果