The first parameter (1000) specifies the grid cell size in meters, because that is the linear unit of the SRS associated with the location column.
第一个参数（1000）以米为单位指定网格单元格大小，因为米是与 location 列相关联的 SRS 的直线单位。
Meanwhile, the CCSR unit cell loading planar waveguide is a new type of planar waveguide dual-bandpass filter with perfect bandpass characteristic and small size.
单个交叉椅型谐振结构加载的平板波导作为一种新型的滤波器结构，具有良好的双通带特性，尺寸较小。
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