他还与当地农民挖排水沟、种了约一百万棵树。
He has worked with local farmers to dig waterways and plant about one million trees.
明挖扩大基础基坑开挖时，土方采用挖掘机开挖，并由人工配合进行边坡修理、基坑顶面排水沟的修建等辅助工作。
For open spread foundation, the pit is excavated by excavators for earth work with manpower to trim the side slope and build the ditch on top of base pit.
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