Basically, a composite concrete deck consists of a concrete top slab, flanked on each side by concrete main beams, and a concrete middle beam.

组合混凝土梁的基本构成是顶部为混凝土平面，两侧为混凝土主梁，中间为混凝土中梁。

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Multiple anti seismic lines of defence systems having strong column, middle beam and weak brace will be formed by selecting rational reinforced concrete brace sections.

选择合理的钢筋混凝土支撑截面可以形成“强柱、中梁、弱支撑”的多道抗震防线体系。

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The spacecraft, owned by Eutelsat, will beam TV channels into the Middle East and North Africa.

BBC: Sea Launch rocket company returns to service