“单相微型增氧机的研究”经娄底地区农机研究研一年多的努力,通过试制和样机的生产性试验,各项技术指标均达到或超过设计任务书的要求。1987年5月13～14日,由湖南省农机局、省农机鉴定站、省水产研究所和益阳地区农机研究所的领导、专家组成的联合鉴定小组。对样机—YZ—550型增氧机进行了现场测试、验收,并 “Single-phase micro-aerator research” by Loudi Agricultural Research Institute more than a year of hard work, through trial production and prototype test, the technical indicators have reached or exceeded the design requirements of the book. From May 13 to May 14, 1987, a joint appraisal team composed of leaders and experts from Hunan Agricultural Machinery Bureau, Provincial Agricultural Machinery Appraisal Station, Provincial Fisheries Research Institute and Yiyang Agricultural Machinery Research Institute was established. The prototype - YZ-550 aerobics machine on-site testing, acceptance, and