A surveying water pen of simple structure and convenient usage is made in our country that is applied in rice control and water saving irrigation for several years.
我国生产一种结构简单使用方便的测水笔，已在近几年水稻控制节水灌溉中应用。
A surveying water pen of simple structure and convenient usage is made in our country that is applied in rice control and water saving irrigation for several years.
我国生产一种结构简单使用方便的测水笔，已在近几年水稻控制节水灌溉中应用。
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