人工套袋，光电感应，自动计量。
Manually putting bag, photoelectric response and automatically measuring.
我国的聚乙烯醇(PVA)产量占世界PV A产量的30%以上，而长期以来国内PV A产品的包装却一直处于人工套袋的半自动包装状态。
The output of PVA in China accounts for over 30% of the worldwide output, while the packing of domestic PVA products has been in a semi - automatic condition for a long term.
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