T178

a = Surface(t, (2 * cos(s)), (2 * sin(s)), t, 2, 10, s, 0, (2 * pi))
a_1 = Surface(t, ((t / 2 * 2) * cos(s)), sqrt(4 - ((t * cos(s)))^(2)), t, 0, 2, s, 0, pi)
b = Surface((2 * cos(s)), t, (2 * sin(s)), t, 2, 10, s, 0, (2 * pi))
b_1 = Surface(((t / 2 * 2) * cos(s)), t, sqrt(4 - ((t * cos(s)))^(2)), t, 0, 2, s, 0, (2 * pi))
c_1 = Surface(t, s, 0, t, -2, 2, s, -2, 2)
c = Surface(t, (2 * cos(s)), (2 * sin(s)), t, -10, -2, s, 0, (2 * pi))
d = Surface((2 * cos(s)), t, (2 * sin(s)), t, -10, -2, s, 0, (2 * pi))
e = Surface(t, ((t / 2 * 2) * cos(s)), sqrt(4 - ((t * cos(s)))^(2)), t, -2, 0, s, 0, pi)
f = Surface(((t / 2 * 2) * cos(s)), t, sqrt(4 - ((t * cos(s)))^(2)), t, -2, 0, s, 0, (2 * pi))