1. This paper analysis NC machine tool perpendicularity error.

2. Exact perpendicularity between the components must be maintained.

3. With the face grinding attachment , perpendicularity of the endface to the bore after grinding can guaranteed.

4. His square - framed perpendicularity showed more fully now than in the crowed and bustle of the markethouse.

5. Deviations of ovality, perpendicularity and partial concave - convex on large - scaled storage tanks are inevitably in construction.

6. All straight line directions are all valid: Level, perpendicularity or diagonal line direction.

6. try its best to collect and create good sentences.

7. Application of vector method to problems involving parallelism, perpendicularity and division of a line segment.

8. A novel method of F-P etalon perpendicularity adjusting was introduced as well.

9. It can be used in measuring not only dimensional and shape errors, but also relative positions as in the cases of perpendicularity, parallelness, conicity, distance between holes, etc.

10. In installing the steel column, how many mm . Are the deviation range of elevation and perpendicularity?

11. A fast and exact algorithm for the evaluation of the parallelism and perpendicularity on the threecoordinate measuring machine is presented in this paper.