THIS IS FOR BEST PUMP WHICH HAS BEEN INVESTED FOR PHODUCING BACCUM IT IS WHICH IN ACTION AND CAN EXHAUST LATGE BOLUMES IN A SMALL TIME IT IS OPERATED BY MEAND OF AN ELECTRIC MOTOR AND DOES NOT REQUIRE MUCH ATTENTION IT IS WIDELY USED FOR PRODUCING VAMUUM IN ELECTRIC LAMPS RADIO VALES X RAY TUBES ANS IN LABORATORIES FOR PRODUCINGV CCUMN FOR EXPERIMENTAL PURPOSES IT CONFISS OF ECCENTICALLY MOUVTED ROTATING CYLINDER CALLED THE ROTAR THES IS MOUNYED ON A SHAFT WHICH IS ROTATED AT A HIGH SPEED BY AN ELECTRIC MOTOR THE ECCENTRIC ROTAR RATATES INSIDE A CYLINDRECAL SPACE IN A CETOR CASING.
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