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**** 3M invests in HydroNovation **** SnowPure opens Chinese manufacturing facility **** Georg Fischer agrees to acquire Harvel Plastics **** Siemens to buy Cambridge Water **** Ecolab to cut 500 jobs in restructuring **** Pall gets treatment pact with Qatar **** Xylem to expand services in France **** Water Research Foundation plans $6.4 million 2012 research program ****