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结合具体工程实例，对延长墙背法和力多边形法进行了比较。
The extending method and polygon method are compared for a project case.
youdao
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结合具体的工程实例，讲解了该模型的使用方法。
Through the example of blasting project how to use the model is shown.
youdao
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结合具体的工程实例，讲解了该模型的使用方法。
Through the example of blasting project how to use the model is shown.
youdao