six DOF六自由度sixnum.六six thousand five hundred and seventy two(=6572) 六千五百七十二six thousand nine hundred and fifty seven(=6957) 六千九百五十七six thousand five hundred and fifty eight(=6558) 六千五百五十八six thousand three hundred and twenty six(=6326) 六千三百二十六six thousand eight hundred and forty five(=6845) 六千八百四十五Six-Hundred Megacycle Air Defense Radar六百兆赫防空雷达six thousand two hundred and eighty eight(=6288) 六千二百八十八six thousand seven hundred and thirty six(=6736) 六千七百三十六six thousand five hundred and thirty four(=6534) 六千五百三十四six thousand seven hundred and twenty six(=6726) 六千七百二十六