six DOF六自由度sixnum.六six thousand four hundred and fifty eight(=6458) 六千四百五十八six thousand four hundred and forty seven(=6447) 六千四百四十七six thousand two hundred and twenty three(=6223) 六千二百二十三six thousand three hundred and eighty one(=6381) 六千三百八十一six thousand nine hundred and eighty four(=6984) 六千九百八十四six thousand five hundred and seventy one(=6571) 六千五百七十一six thousand five hundred and eighty nine(=6589) 六千五百八十九six thousand two hundred and ninety three(=6293) 六千二百九十三six thousand nine hundred and forty three(=6943) 六千九百四十三six thousand nine hundred and eighty nine(=6989) 六千九百八十九