six DOF六自由度sixnum.六six thousand nine hundred and fifty eight(=6958) 六千九百五十八six thousand five hundred and fifty three(=6553) 六千五百五十三six thousand four hundred and fifty three(=6453) 六千四百五十三six thousand six hundred and eighty eight(=6688) 六千六百八十八six thousand five hundred and fifty seven(=6557) 六千五百五十七six thousand three hundred and ninety two(=6392) 六千三百九十二six thousand three hundred and eighty two(=6382) 六千三百八十二six thousand six hundred and seventy five(=6675) 六千六百七十五six thousand eight hundred and sixty four(=6864) 六千八百六十四six thousand three hundred and thirty two(=6332) 六千三百三十二