工厂化高效农业示范工程技术要求及指标一、华北型连栋塑料温室结构及调控设施的优化设计与实施１．温室结构连栋拱园型或连栋屋脊型，东西向连栋，南北延长，长度３０米～３５米，开间３．０米，单栋跨度７米～８米，温室高度４．５米左右，天沟高度２．８米～３．０米，... Industrialization and efficient agricultural demonstration project technical requirements and indicators A, North China-style multi-span plastic greenhouse structure and control facilities, the optimal design and implementation 1. Greenhouse structure of multi-arch garden or ridge type ridge, east-west ridge, extending from north to south, length 30 meters to 35 meters, 3.0 meters open, single span 7 meters to 8 meters, the greenhouse height of 4.5 meters , Gutter height of 2.8 meters to 3.0 meters, ...