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| Q. |
To design a cross-over between parallel tracks, the required components are: |
| A. | two switch points, two acute angle crossings and two check rails |
| B. | two switch points, two acute angle crossings and four check rails |
| C. | two switch points, two acute angle crossings and six check rails |
| D. | none of these |
| Answer» B. two switch points, two acute angle crossings and four check rails | |
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