Irrigation techniques. centre pivot and moving lateral systems. part 1: presentation of the technical characteristics.
灌溉技术。中心轴旋转和横向移动浇灌系统。第1部分：技术特征的显示。
Green circles in the desert frequently indicate tracts of agriculture supported by centre-pivot irrigation.
这片位于沙漠里的密集绿圈代表由中枢灌溉系统支持的农业生产。
Green circles in the desert frequently indicate tracts of agriculture supported by centre-pivot irrigation.
这片位于沙漠里的密集绿圈代表由中枢灌溉系统支持的农业生产。
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