Portable hand-held COD meter designed to provide measurements for the most critical water quality parameter.
手持式COD仪表用于测试最重要的水质参数。
The paper introduced the calculating formula of the water quality parameter for irrigation and main methods of the chemical evaluation.
本文介绍了灌溉水质参数的计算公式和最主要的化学评价方法。
The paper introduced the calculating formula of the water quality parameter for irrigation and main methods of the chemical evaluation.
本文介绍了灌溉水质参数的计算公式和最主要的化学评价方法。
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