concave-surface 水面下凹
concave surface key 内凹齿钥匙
stable concave surface 稳定凹曲面
regular concave surface 规则凹坑表面
concave surface recovery 凹表面恢复
conducting concave surface 凹形接地面
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A longitudinal channel extends along the concave surface.
纵向通道沿所述凹面延伸。
This paper investigates the inverted L antennas mounted on a conducting concave surface.
系统地研究了架设在凹形接地面上的倒l天线的电特性。
Topography: Hengyang City in Hunan Province, with a part of the concave surface of the shaft.
地形地貌：衡阳市处于湖南省凹形面的轴带部分。
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