2.2 Lead competitions shall take place on purpose-designed, artificial climbing walls having a minimum height of 12 metres, which shall permit routes to be constructed with a minimumlengthof 15 metres and a minimum width of 3 metres for each route.
3.Abstract: Based on the arc length formulae of the parallel to the easementcurve and its property, this paper gives the parameter equations of the parallel to the easementcurve takiing the arc length itself as variable.
4.This paper gave the calculation formula ofminimum deviation angle of a prism and the curved relation line ofminimum deviation angle varying with wave lengthof entrance light.
6.To calculate the lengthof the main macro crack with variable fractal dimension, a differential relationship between the fractal lengthof a curve and the corresponding Euclidian length is put forward by extending the definition of the fractal lengthof a curve.
