| 摘要 |
A flow measuring valve device ( 1 ) for fluid, the flow measuring valve ( 1 ) comprising a first restriction ( 48 ) and a second restriction ( 76 ) connected in series with the first restriction ( 48 ), the flow rates of said restrictions ( 48, 76 ) being unequally dependent on the viscosity of the fluid, and a method for determining the viscosity of the fluid by means of the device.
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