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| Chromalox |   | |
| Coast Scientific |   | ||
| Consort nv |   | ||
| Control Co. |   | ||
| huaan medical&health instruments co., ltd. |   | ||
| Extech Instruments |   | ||
| Hart Scientific |   | ||
| Jenco Instruments Inc. |   | ||
| Keithley Instruments |   | ||
| Megatron Electronics & Controls |   | ||
| Mikron Instrument Company, Inc. |   | ||
| Omega Engineering, Inc. |   | ||
| PMMI, Inc. |   | ||
| Reotemp Instrument Corporation |   | ||
| Amprobe |   | ||
| Thermo Electric Company |   | ||
| TPS Pty Ltd |   | ||
| Winters Instruments |   | ||
| Guildline Instruments Inc. |   | ||
| Yokogawa Corp. Of America |   | ||
| Dresser Instrument 250 East Main Street - Stratford, CT 06497 USA |   | ||
| Fluke 6920 Seaway Blvd - PO Box 9090 - Everett, WA 98206 USA |   | ||
| Wavetek Wandel Goltermann 1030 Swabia Court - Triangle Park, NC 27709 USA |   | ||
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