天然气计量现在仍以差压式流量计中的孔板流量计为主。
The metering of natural gas still presently depends on orifice flowmeter, one of differential pressure flowmeters.
综合分析了影响孔板流量计计量精度的主要因素，提出了提高孔板流量计计量精度的有效措施。
Comprehensively analyzed are the main factors that affect the measuring accuracy of the orifice flowmeter. Proposed are some effective measures to improve its measuring accuracy.
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