A poly-.beta.-carboxyacrylamide polymer of formula (I) wherein X is an alkaline metal or a substituent capable of bringing about an exchange reaction with a salt of an alkaline earth metal, said polymer having a ponderal average molecular weight greater than or equal to 2,000. The use of said polymer and process for preparing the same ##STR00001##

 
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< Arrangement and method for maintaining a minimum flow velocity in the coolant return of a machine tool coolant filtration system

> Filter canister, system containing filter canister, and their use

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