mercury regulating unit
... mercury recording thermometer 水银记录式温度计 mercury regulating unit 水银调节装置 mercury relay 水银继电器 ...
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将恒温鼓风干燥箱温控装置由老式水银电接点式温控器改造成了新式的数显调节仪，收到了良好效果。
It is to put forward a new suggestion to improve the out-datde air-blower-driver drying closets:replace the outdated electric contact thermometer with the digital temperature regulator.
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