The designing principle, construction and realizing method of a portable and high accurate soil nutrient photoelectric colorimeter are described.
介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。
The designing principle, construction and realizing method of a portable and high accurate soil nutrient photoelectric colorimeter are described.
介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。
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