| http://www.w3.org/ns/prov#value | - Patent US3638490 - Fluid flow measuring device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsMeans for determining the velocity and depth of a flowing body of fluid such as fluid flowing in a water or sewer main, said means including conduit means immersed in the flowing fluid, means forcing gas out through the immersed conduit means in
|
