... wrist watch 手表 surveying water pen 测水笔 socioeconomic system 社会经济系统 ...
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surveying water pen
测量水笔
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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