【摘要】 本文简要介绍了半自动真空包装机的结构特点和工作原理。针对原设计存在的三个主要问题，逐项进行了改进设计，提高了包装机的工作性能和操作性能，取得了良好的结果。更多还原

【Abstract】 The structure and workingmechanism of a semiautomatic vacuumpacking machine is introduced briefly in thispaper.improving design is made in order tosolve the major problems existed in originalmachine.Its working and operating performances are improved markedly.更多还原