短語詞組短語free turning 自由掉頭;船舶自由掉轉(zhuǎn);自由掉頭船舶自由掉轉(zhuǎn);自由廻轉(zhuǎn)free turning detail 船舶自由掉轉(zhuǎn)free -turning roller take-off 活輥引出機(jī);活輥牽引機(jī) 返回 turning free