B series pneumatic field mounted conreollers . differential pressure instruments B系列气动基地式仪表.差压仪表
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Dwyer has been for 75 years in the world , its low differential pressure instruments are high appreciated and are applied broadly over the world 作为孔流速计使用magnehelic或minihelic压力计可以作为孔流速计使用。用气压疏通孔可以保护压力计不与流体直接接触或发生阻塞。