... 变幅速度||radius changing speed 变幅载波||variable carrier 变缸发动机上停止气门工作的油压转换阀||oil control valve ...
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The crude touchwood carrier with a coarse surfacewas of great absorption so that it was suitable for the microorganisms to grow on and it wasable to adapt to variable volumetric loading well.
天然朽木填料表面粗糙，具有较好的吸附性能，适合微生物生长，抗冲击负荷能力强。
The principle of cascade H-bridge converter is analyzed. Variable-Frequency Carrier Bands PWM(VFCB-PWM) technique is discussed. Cascade H-bridge converter based on VFCB-PWM technique is proposed.
分析了级联H桥型变换器的工况，讨论了载波带频率变化的PWM（VFCB-PWM）技术，提出了基于VFCB-PWM技术的级联H桥型多电平变换器。
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