1、水力计
... potamology 河流学 potamometer 水力计 potamoplankton 河流浮游生物 ...
2、流速仪
...流速仪 current log; current meter; currentmeter; flow-velocity meter; hydrodynamometer; hydrometer flow meter; hydrometric flow meter; hydrometric propeller; potamometer; velocity meter等深海流 contour current .