求翻译：严松在人工移栽营养钵棉苗的过程中，发现人工打穴劳动强度大、工效低。有没有既便宜、打穴效果又好的打穴机呢？2008年年初，严松用推压板、凸轮、轮圈等试制打穴机。经过多次试验，几个月后，一种可调式营养钵棉苗移栽打穴机发明成功。严松正已向国家专利局申请实用新型发明专利权。是什么意思？

Yan Song in the process of transplanting artificial nutrition pot cotton seedlings, found artificial Punch labor intensity and low efficiency. There are no cheap, Punch effect good Punch Machine? In early 2008, Yan Song Punch machine push plate, cams, wheels and other trial. After numerous experimen

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Yan Song in the artificial process of transplanting seedling of cotton seedlings, discover artificial playing dibble, ergonomics and low labor intensity. Is there any cheap, play points and good points about the effect? In early 2008, Yan Song push plate, cam, wheels and other trial point hitting ma