也可在电缆上作另外的标记，来预先确定污泥层位置的最高点与最低点。
Additional markings can be added to the cable to pre-define maximum and minimum sludge blanket positions.
感应电缆上的标记可以用来探测污泥层的深度。
The markings on the sensor cable are then used to determine the depth of the blanket.
感应电缆上的标记可以用来探测污泥层的深度。
The markings on the sensor cable are then used to determine the depth of the blanket.
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