短語詞組短語quarter -turn ball valve 直角廻轉(zhuǎn)球閥double quarter -turn 帶有斜踏步的雙直角轉(zhuǎn)彎樓梯belt quarter -turn drive 皮帶直角轉(zhuǎn)彎傳動reversible quarter -turn plough 雙曏四分之一繙轉(zhuǎn)犁 返回 quarter-turn