OPIs BASED ON THE EUROPEAN STANDARD (EN 837-1)
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Liquid Fillable Gauge OPI
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Utility Gauge OPI
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Refrigeration Gauge OPI
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Capsule Gauge OPI
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Process Gauge OPI
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OPIs BASED ON THE AMERICAN STANDARD (ASME B40.100)
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Liquid Fillable Gauge OPI
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Utility Gauge OPI
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Refrigeration Gauge OPI
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Capsule Gauge OPI
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Process Gauge OPI
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OPIs BASED ON THE AUSTRALIAN STANDARD (AS-1349)
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Liquid Fillable Gauge OPI
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Utility Gauge OPI
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Refrigeration Gauge OPI
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Capsule Gauge OPI
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Process Gauge OPI
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