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Dv-4（热电偶规管）
品 牌：集加实业
产品特点：Teledyne Hastings, manufacturer of the original DV-4 and DV-6 thermocouple vacuum gauge tubes
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产品大全
produces vacuum measurement equipment with exceptional stability, accuracy and reliability under the most demanding conditions. These vacuum sensors are calibrated for nitrogen or air, but conversion factors for other gases are available from the factory.