filter

v.t. & i. १ गाळणे, गळणे २ निस्यंदन करणे, निस्यंदित होणे n. १ (as, a contrivance for freeing liquids or gases from suspended impurities esp. by passing them through a porous article or mass such as paper, sand, etc.) गाळणी (स्त्री.), फिल्टर (न.) २ Elec. Comm. (as, an entity or device for eliminating or reducing certain waves or frequencies while leaving others relatively unchanged) निस्यंदक (पु.)

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film concept

(a hypothesis that there exists, at surfaces of contact between solids and fluids, liquids or gases which are in motion relative to one another, a relatively slowly moving film of the fluid, which decreases in thickness with increasing velocity, parallel to the surface of the main body of the fluid) पटल संकल्पना

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