Min/Typ/Max Values
Min Value - the minimum delay that you expect the gate to have
Typ Value - the typical delay that you expect the gate to have
Max Value - the maximum delay that you expect the gate to have
#(Min:Typ:Max, Min:Typ:Max, Min:Typ:Max)
and #(1:2:3) u1 (co, a, b);
and #(1:2:3, 1:2:3) u2 (co, a, b);
bufif0 #(2:3:4, 2:3:4, 3:4:5) u3 (out, in, enable) ;