它适合于曝气生物滤 池，使生物滤池能更加稳定高效的运行。
The filling is suitable for aeration biological filters, and enables the biological filters to operate more stably and highly-effectively.
它适合于曝气生物滤 池，使生物滤池能更加稳定高效的运行。
The filling is suitable for aeration biological filters, and enables the biological filters to operate more stably and highly-effectively.
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