reference railの例文

例文

1. It is the distance ( in inches or millimeters ) from the midpoint of the string line to the gauge of the reference rail.
2. This can be done by using a string line to be a chord to connect the arc at the gauge side of the reference rail.
3. Then at the midpoint of the string line ( at the 31st foot ), a measurement is taken from the string line to the gauge of the reference rail.
4. The horizontal alignment ( or "'alinement "'in the United States ) is done by using a predefined length of string line ( such as 62-foot in the US and 20 meters in Australia ) to measure along the gauge side of the reference rail.