On the oilfields metering of water-content crude basically is by means of dynamic methods, people not much considers the allowable standard accuracy.
油田集输系统中的含水原油计量多采用动态计量方式,对计量准确度能否满足标准要求考虑较少。
Several factors effecting on BOD in the industrial waste water were studied by using the differential-pressure metering device of BOD, and the corresponding improving methods were put forward.
探讨了利用差压式BOD测定装置测定工业废水中BOD时影响其准确度的几个因素,并提出了相应的改进方法。
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