Before making mud, clean all the circulation pipe-line and mud pits.
配浆前要认真清洗循环管线和配浆池。
Rifled or other pipe wall corrugation may change the flow from a hetero-generous to a homogeneous regime by introducing a secondary circulation.
在有来复线的或其它的管壁皱纹的管中，由于引起副流，可能将非均质流转变为均质流。
The characteristics and applications of the thin plate fixed bed adsorbers in the circulation ventilation pipe systems were presented.
介绍了薄平板型固定床吸附器在循环通风管路系统中的使用特性和应用效果。
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