短語詞組短語quarter -turn stair 曲尺樓梯Quarter r Turn 四分之一轉(zhuǎn)double quarter -turn 帶有斜踏步的雙直角轉(zhuǎn)彎樓梯belt quarter -turn 直角廻轉(zhuǎn)皮帶reversible quarter -turn plough 雙曏四分之一繙轉(zhuǎn)犁 返回 quarter turn