A new method to design the free shape of piston ring is described in this paper.Without the simplifications that adopted in the three traditional design methods,this method is of a high accuracy.是什么意思_A new method to design the free shape of piston ring is described in this paper.Without the simplifications that adopted in the three traditional design methods,this method is of a high accuracy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句