Draw to scale by means of a scale and protractor.
通过比例尺和量角器按比例绘制。
Excuse me, Sir. What does this protractor read?
抱歉先生，这个量角器是怎么读的？
The protractor must be placed on the pipe in the position shown below.
量角器必须放在管道上如下图所示的位置处。
The protractor must be placed on the pipe in the position shown below.
量角器必须放在管道上如下图所示的位置处。
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