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The pressure-indicating device, as part of the retest apparatus, is accurate within±1.0% of the prescribed test pressure of any cylinder tested that day. The pressure indicating device, itself, must be certified ashaving an accuracy of ±0.5%, or better, of its full range, and must permitreadings of pressure from 90%-110% of the minimum prescribed test pressure ofthe cylinder to be tested. The accuracy of the pressure indicatingdevice within the test system can be demonstrated at any point within 500 psigof the actual test pressure for test pressures at or above 3000 psig, or 10% ofthe actual test pressure for test pressures below 3000 psig. 请高手赐教！ | 
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发表于 2015-6-24 10:35:42
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