Take out a ruler draw a line.

　　拿出直尺，畫條線；

　　Proportional servo valve, grid ruler and CNC machine tool

　　伺服比例閥、光柵直尺與數(shù)控機床

　　At breast height, measure the trunk diameter by a ruler.

　　在胸部高度的位置，用一把直尺量度干徑。

　　I have got a ruler. Will that do?

　　我有一把直尺。能行嗎？

　　He holds a ruler and clatters about with little dancing steps.

　　他拿著一根直尺，走著小舞步發(fā)出咔噠咔噠的聲音。

　　Use the ruler and the feeler to inspect whether the joint surface of the cylinder head is deformed.

　　利用直尺和塞尺檢查氣缸頭的結(jié)合面是否有變形。

　　Both the clamping edges are provided with scales and are perpendicular tothe ruler.

　　兩個卡邊上都有刻度并垂直于直尺。