变桨控制
the variable pitch control
Variable-pitch control
pitch control
农林复合生产系统
agro-afforestation system
农技咨询系统
agricultural technical advisory system
农机设计系统
agriculture mechanization design system
农果复合系统
Agro-fruit ecosystem
Ecosystems of crops and fruit trees
农机维修系统
maintenance system for agro-machinery
农果复合生态系统
crop-fruit ecological system
农林复合生态系统
agri-forest compound ecological system
agri-forestry ecosystem
agroforestry ecosystem
agro-forestry ecosystem
Compound agricultural and forest ecosystem
agro-forestry ecosystems
Agroforest ecosystem
农林牧复合生态经济系统
Agro-forestry-animal husbandry ecoeconomic system