王占林。近代电气液压伺服控制[M]。北京:北京航空航天大学出版社,2005。
WANG Zhanlin. Modern Electrical Hydraulic Servo Control [M]. Beijing: Beihang University Press, 2005.
旱地、天然草地和未成林造林地三者变化面积占四子王旗土地变化面积的96.67%。
Dry land, natural grassland and immature forest of change area account for 96.67% of land change area in Siziwang banner.
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