A system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor capable of guiding high-frequency electromagnetic waves.
物质边界装置，形状是一根固体电介质杆或充满电介质的管状导体，能够导引高频电磁波。
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The results show that it has much better performance than that of the baseline rod of the same mass, whose diameter is equal to that of the tubular part of the telescopic penetrator.