The principle, structure of the NBT-1 model of density adjusting unit were introduced. It can form a complete set with the density testing meter to control the density of the paper pulp.
介绍NBT 1型浓度调节器的结构、原理，该调节器与浓度变送器配套，可以控制纸浆的浓度。
In order to offer reference for periodic check of free turbine, the minitype Rev testing meter of free turbine was designed.
为给自由涡轮转速装置的定检提供参考，设计了微型自由涡轮转速测试仪。
In order to offer reference for periodic check of free turbine, the minitype Rev testing meter of free turbine was designed.
为给自由涡轮转速装置的定检提供参考，设计了微型自由涡轮转速测试仪。
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