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• Wagner Instruments[No URL available; Tel: (800) 345-4188]

• Wahl Instruments, Inc.[No URL available; Tel: (800) 421-2853]

• Wako BioProducts, Wako Chemicals USA, Inc.

• Waltron Ltd.

• Warning Products Division, Laboratory Sales[No URL available; Tel: (860) 379-0731]

• Water-Jel Technologies

• Waters Corporation

• Water Saver Faucet Company[No URL available; Tel: (312) 666-5500]

• Watlow Electric Manufacturing Company

• Watson-Marlow/Bredel Pumps

• Wavetek Wandel Goltermann

• Weber Scientific

• Wedgewood Technology, Inc.

• Weed Instrument, Industrial Division

• Weiss Research Inc.

• Welch Vacuum Technology, Inc.

• WEMS, Inc.

• Wescor, Inc.

• West Coast Analytical Service, Inc.

• The Western States Machine Company, Chemical Machine Division

• Westmoreland Testing and Research Inc.[No URL available; Tel: (724) 872-8811]

• Whatman Polyfiltronics

• Whatman Inc.

• Whitney Products

• Wilden Pump

• Wilkens-Anderson Co.

• Wilks Enterprise, Inc.

• Wilmad/Labglass

• Wisconsin Oven Distributors

• Worklon, Division of Superior Uniform Group

• World Precision Instruments Ltd.

• Worthington Biochemical Corporation

• Wyatt Technology Corp.