Moreover it calculates the labours cost, the public expense, the fuel fee. the maintenance outlay, the depreciation of the equipment and the exes for the heavy overhaul scientifically.4.

• 并科学测算了组成农业供水成本的人工成本、公用费用、燃料动力费、水利工程维修养护费、固定资产折旧费和大修费等费用。