短语词组短語fixed tolerance band compaction 固定容差範圍數據精減fixed tolerance -band compaction 固定容差頻帶緊密法variable -tolerance-band compaction 變量限界數據精簡法fixed -tolerance-band compaction [計]固定容錯範圍的數據壓縮compaction band 壓縮帶 返回 band compaction