Based on the principle of mass balance, the Pseudo-Level Depth Finder can attain the true level by testing annular gas rate.

根据物质平衡方法设计的拟液面测试仪，可通过测试油井环空排气量来确定油井的真实液面。

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The solids density and solids residence time in circulating fluidized bed increase with increasing solids circulation rate and reducing gas rate.

降低气速、提高颗粒循环速率，可以提高床内颗粒浓度，增加颗粒停留时间。

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Experimental equitions on the relation between the gas holdup of an individul channel and gas rate in either riser have been obtained by processing experimental data.

对实验数据进行回归处理得到了各区气含率与两上升区气速的经验关系式。

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Duke Energy Ohio applied for electricity and natural gas distribution rate hikes with the Public Utilities Commission of Ohio in July 2012.

FORBES: Duke Worth $70 On Merger Synergies, Improving Margins

"Britain's North Sea gas supplies are running out and British Gas has to pay the going rate for gas in a competitive global marketplace, " said Mr Bentley.

BBC: British Gas vehicle and employee

Inside the tube, coal is being converted into natural gas at a rate that could transform the debate about one of the nation's dirtiest fuels.

FORBES: Magazine Article