関連ワード:  what is vortex flow meter    what is vortex type flow meter    what do vortex flow meters measure    what is k factor in vortex flow meter    what is dsc sensor in vortex flow meter    what is the principle of vortex flow meter    what is a vortex shedding flow meter    what is bluff body in vortex flow meter    what is coriolis flow meter    how does a vortex flow meter work