可行时，经aa批准，开垦土地或土方工程应使用干净的挖掘物。
Clean excavated material shall be used for land reclamation or earthwork where practicable and subject to approval by AA.
建筑工程包括地盘平整和挖掘土方工程。这些工程将有需要进行移除废土。
Construction work will involve site formation and earthwork excavation, which will necessitate the removal of spoil.
另外，挖掘出来的土方则用于制造建筑所需的混凝土和碎石路面。
The excavated earth was used to make the concrete and also as an ingredient of the gravel surfacing.
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