... 角钢剪切机 angle shearing machine; angle shears; angle-iron shearing machine 型钢剪断机 section shears 型钢剪切机 beam cutter; joist shears ...
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And base on the experiment, calculating formula of cross section mean velocity's reduction after planting and bed shears stress of vegetation dam block are established.
同时在试验的基础上，推导得植树后断面平均流速减小值和植物坝段床面剪应力的计算公式。
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