DIN EN ISO 20227 (2016-06)废止
Water quality - Determination of the growth inhibition effects of waste waters, natural waters and chemicals on the duckweed Spirodela polyrhiza - Method using a stock culture independent microbiotest (ISO/DIS 20227:2016); German and English version prEN ISO 20227:2016
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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