AF protection ratio 音频保护比
AF signal to interference ratio 音频信号干扰比
AF Air-Fuel Ratio 混合气的空气燃油比 ; 混合气的空气
voltage ratio of AF transformer 音频变压器的电压比
AF air fuel Ratio 混合气的空气燃油比
The production efficiency would enhance and the physical property of the compound would improve after adjust the concentration and compounding ratio of bisphenol-AF and BPP.
通过调整双酚af和BPP的用量和配比，能够有效的缩短正硫化时间，提高生产效率，改善胶料的物理性能。
With Cox regression patients with AF were shown to be at higher risk of dying from embolism (adjusted hazard ratio 4.33 95 confidence interval 1.78 to 10.52) but not from other causes.
Cox回归分析法显示，房颤患者死于栓塞的风险更高（调整后危险比， 4.33 95 ％可信区间为 1.78至10.52 ） ，而不是讲死于其他原因。
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