The vase is a CNC model consists of more than 116000 G01 codes with total tool path length of 46.67m. Its B-spline representation consists of more than 42000 quadratic curve segments. A set of quadratic polynomials x = a2 x^2 + a1 x + a0 y = b2 y^2 + b1 y + b0 z = c2 z^2 + c1 z + c0 is represented by [[a0, a1, a2], [b0, b1, b2], [c0, c1, c2]] A quadratic spline consisting of n segments defined on [0,1] is represented by [c1,c2,...,cn, [u1=0,u2,...,u_n,u_{n+1}=1]] where each ci is a quadratic polynomial defined on [u_i,u_{i+1]]. We group together the splines with the same x-coordinate: [s1,s2,...,sm] The model consisting of k tool pathes each with a fixed x-coordinate is represented by [r1,...,rk] where r_i is a group of splines with the same x-coordinate. 2011.5