The new device emits a powerful circular column of light.
这个新装置发出一束强烈的环形光柱。
Concrete structure with circular cross section, especially concrete column has wide application in engineering.
截面混凝土结构在工程中应用广泛，尤其以混凝土柱居多。
Concrete structure with circular cross section, especially concrete column has wide application in engineering.
圆形截面混凝土结构在工程中应用广泛，尤其以混凝土柱居多。
Concrete structure with circular cross section, especially concrete column has wide application in engineering.
圆形截面混凝土结构在工程中应用广泛，尤其以混凝土柱居多。
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