**Table 1:** Parameters of the Sa, Sb, Sc galaxy models. The unit system is G=1: the mass unity is $U_{\rm m}=2.26$ $\times$ $10^9~M_\odot$ , the length unity is $U_{\rm r}=1.02$ kpc.
Run	$M_{\rm d}$	$M_{\rm b}$	Gas	$a_{\rm d}$	$a_{\rm g}$	$M_{\rm h}$	$b_{\rm h}$
Sa	40	12.7	$2\%$	4	6	146.3	29.4
Sb	30	5	$5\%$	5	7.5	118.9	24.8
Sc	20	2	$7\%$	6	9	92.8	20.9

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