3M Company American Gas & Chemical Co. Ltd. ARALAB LDA. Astec Environmental Systems Automation Products Inc. Bacharach Inc. Bel-Art Products Broen Armatur A/S Cole-Parmer Instrument Co. Conviron Div. of Controlled Environments Inc. Eurotherm Controls Inc. Flow Sciences Inc. Foxboro Co. Harris Manufacturing Co. Jenway Ltd. Kewaunee Scientific Corp. LND Inc. MISCO Omega Engineering Inc. Photovac International Inc. Pope Scientific Inc. Rees Scientific Corp. Revco Scientific International Safelab Systems Ltd. Sensidyne Inc. Servomex Co. Sieger Ltd. Teledyne Brown Engineering Analytical Instruments Thermo Environmental Instruments Inc. Thomas Scientific TS Scientific Whatman International Ltd.
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