In this research, the earthworms soil bed was regarded as an experiment equipment of sewage disposal.

本研究将蚯蚓——土壤床作为污水处理的一种试验装置。

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In this research, the earthworms soil bed was regarded as an experiment equipment of sewage disposal.

本研究将蚯蚓——土壤床作为污水处理的一种试验装置。

youdao