草地小流域
grassland small catchment
差速器主小齿轮轴承罩
differential drive pinion cage bearing
大小地震
large and small earthquake
旱地小麦
Wheat in dry land field
wheat
wheat of dryland
wheat in dryland
Dry land wheat
dryland winter wheat
Dryland wheat
Dry-land wheat
drought area’s winter wheat
旱地小麦品种
dryland wheat varieties
Huang-huai winter wheat region
减小地震灾害
earthquake disaster reduction