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。
Align pivot point to world and centre to object and place at base.
调整轴点到世界，放在物体的基座中心。
Align pivot point to world and centre to object and place at base.
调整轴点到世界，放在物体的基座中心。
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