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去年由农机部、水利部共同组织的全国轻小型喷灌机具评比中,参加评比的喷头见表。共检测了70只喷头,评比结果见本刊1981年第12期。现分析如下: 一、“三化”水平全国有近百家工厂生产PY_1摇臂式喷头,规模最大的新昌喷灌机厂、金坛喷灌机厂等,年产量超过万只。这就改变了喷头品种繁多互不通用的状况,大大提高了喷头的“三化”水平。但从使用角度看,PY_1系列中尚需增加抗风能力强和适于树下喷灌的低仰角
Last year by the Ministry of Agriculture, Ministry of Water Resources jointly organized small and medium-sized irrigation machinery appraisal, to participate in the competition of the nozzle table. A total of 70 nozzles were detected, the results of the comparison see the first issue of 1981 No.12. Now analysis is as follows: First, the level of “three of” Nearly 100 factories in the country PY_1 rocker nozzle, the largest Xinchang Irrigation Factory, Jintan Irrigation Factory, the annual output of more than 10,000. This changed the nozzle a wide range of mutually exclusive conditions, greatly improving the nozzle “three of ” level. However, from the point of view of use, the PY_1 series needs to increase the wind-resistant ability and low elevation angle suitable for sprinkler irrigation