在水库、水电站等工程中，对于弧形钢闸门的稳行性，根据弧门的构造可将主框架视为矩形、梯形和多层三角形框架进定分析。

The stability of steel radial gates used in reservoirs, hydroelectric power stations, etc. is studied by modelling them as rectangular, trapezoidal or triangular frames.

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每个元素单元都有一个包括矩形框架和三角形屋顶的简单布局。

Each elemental unit has a simple layout consisting of a rectangular box and a triangular roof.

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该框架的核心是你的自行车，你会希望有一个良好的，在这个价格区间合金将是首选，碳叉，可能是碳后方三角形。

The frame is the heart of your bike and you will want a good one, at this price range alloy is going to be the first choice with carbon forks and possibly a carbon rear triangle.

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