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述我厂原用的12工位回转式插袋包装机是70年代的自制产品。它虽然具有设备结构简单、操作方便、节省人力的优点，但采用容积法称量，存在称量精度低、误差大的缺点，因此急需改进。我们对全国六个中型化肥厂包装机的使用情况进行了调查，综合调查资料，提出了两个改进设计方案
Described my factory original 12-station rotary bag packaging machine is 70’s self-made products. Although it has the advantages of simple equipment structure, convenient operation and manpower saving, volumetric method has the disadvantage of low weighing accuracy and large error, so it is in urgent need of improvement. We investigated the use of six medium-sized fertilizer plant packaging machines in our country. Based on the survey data, we proposed two improved design schemes