大生产试验 meaning in English

full production test

Productive durability test and oxygen transfer performance test in clean water per diffuser for seven kinds of diffusers were studied respectively in this paper , and serving diffusive area , air flow , varied resistance , varied resistance after stopping air flow , diffusive strength were also investigated in the productive testing period
摘要对7种曝气器产品分别进行了单盘耐用性生产试验、单盘清水充氧性能试验以及对在大生产试验期间的服务面积、供气量、阻力变化、停气后阻力变化、曝气强度等方面进行了测试对比工作。