Non-hazardous treatment 无害化处理
non-hazardous treatment of feces 粪便无害化处理
non-hazardous treatment of night soil 粪便无害化处理
Although these treatment methods may have been intended for non-hazardous materials, they were employed for hazardous materials as well.
尽管这些治理方法或许用于无毒害的物质，同时也可用于有毒害的物质。
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