A mechanical part is given in the first coordinate system (x1-y1-z1) with all dimensions shown in the following
diagram. A through hole is designed at its centre with a radius of 0.3. The second coordinate system is established
at the centre of the top plane of the part. Its y2-axis is parallel to x1-axis, its z2-axis is perpendicular to this top
plane, and its x2-axis is a cross-product of y2 and z2. Find the parametric representation of the hole surface in the
second coordinate system.