浮游区 meaning in English

pelagic region

In the past , many experts on cotton spinning wished to combine the nitto model drafting technics of little proparea gauge , small flotation area and strong controlling with the drafting model pressurized by cradle , feasible results still having not been achieved
过去曾有许多棉纺专家希望把日东式牵伸的前区小隔距、小浮游区、强控制的牵伸工艺与摇架加压的牵伸形式相结合，但一直没有可行的成果面世。