However, the HF subband is created by subtracting the synthesized LF subband from original image but not by 2-D high-pass filtering original image.
但是，高频子带并不是通过2-D高通滤波原始图像，而是通过原始图像与合成的低通子带相减得到的。
Configuration: 2-way symmetrical, dual LF, triple HF.
配置：2路对称，双低频，三高频。
Only the latter 2 stages, of course, qualify for the traditional clinical diagnosis of HF for diagnostic or coding purposes.
当然，这种心衰分期方法中只有后两期符合心衰的传统临床诊断。
Spary wet dedusting is an effective measure to purify tail-gases, and other toxic gases (so 2 and HF) can also be removed, which was proved by experiment.
实践证明喷雾湿法除尘是净化尾气的有效措施，可以达到高效除尘的目的，并能同时除去其他有害气体。
Spary wet dedusting is an effective measure to purify tail-gases, and other toxic gases (so 2 and HF) can also be removed, which was proved by experiment.
实践证明喷雾湿法除尘是净化尾气的有效措施，可以达到高效除尘的目的，并能同时除去其他有害气体。
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