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关注:1
2013-05-23 12:21
求翻译:After that the system was operated firstly using clean water to wash the sand filter media and remove any impurities that may exist on it; this step continued till reaching a steady state flow in order to be cleaned water.是什么意思?![]() ![]() After that the system was operated firstly using clean water to wash the sand filter media and remove any impurities that may exist on it; this step continued till reaching a steady state flow in order to be cleaned water.
问题补充: |
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