在大多数州建筑法规规定，一个合格的工程师设计和授权或批准的挡土墙大于4英尺高。

Building codes in most states require that a qualified and licensed engineer design or approve retaining walls that are greater than four feet in height.

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在大多数州建筑法规规定，一个合格的工程师设计和授权或批准的挡土墙大于4英尺高。

Building codes in most states require that a qualified and licensed engineer design or approve retaining walls that are greater than four feet in height.

youdao