\begin{table} %t1
  \caption{Key properties of the massive binary evolution models
    (20~$M_{\sun}$ + 15~$M_{\sun}$) as defined and discussed in
    Sect.~\ref{bin:hil}.  \label{tab:smc} } %\centering
\par
    \small
\begin{tabular}{c c c c c c c c c c c c}         
\hline\hline \noalign{\smallskip}                      
$P_{\rm orb}$ & 
$t_{\rm RL}$ & 
$t_{\rm delay}$ &  
$ t_{\rm RL} - t_{\rm enh} $  & 
$R/R_{\rm RL} $ &  
X$_{\rm He,~center}$ & 
$ \log \epsilon ({\rm N}^{14})$ & 
$ ^{}{\rm B}_{\rm RL}/^{}{\rm B}_{\rm init}^{a}$ & 
$ ^{}{\rm C}_{\rm RL}/^{}{\rm C}_{\rm init}^{a}$ &
$ ^{}{\rm N}_{\rm RL}/^{}{\rm N}_{\rm init}^{a}$ &
$\langle \varv_{\rm eq} \rangle^ {b}$ & 
$\varv_{\rm eq,~RL}^{b}$ \\
(d) & (Myr) & (Myr) &(Myr) & ($t=t_{\rm enh} $)   & ($t=t_{\rm RL} $) & ($t=t_{\rm RL} $) & & & &  (km~s$^{-1}$) & (km~s$^{-1}$)  \\
\hline 
  1.1 &   3.3 &   1.3 &   1.0 &   0.92&   0.42 &   7.12 &   0.11  &   0.87 &   4.17 &    243 &  267 \\
  1.2 &   3.9 &   1.6 &   1.2 &   0.90&   0.47 &   7.07 &   0.08  &   0.85 &   3.71 &    228 &  260 \\
  1.4 &   5.0 &   2.1 &   1.5 &   0.86&   0.55 &   6.98 &   0.06  &   0.82 &   3.04 &    203 &  248 \\
  1.6 &   5.5 &   2.7 &   1.0 &   0.86&   0.61 &   6.89 &   0.07  &   0.83 &   2.45 &    181 &  234 \\
  1.8 &   6.0 &   3.2 &   0.9 &   0.86&   0.65 &   6.85 &   0.07  &   0.83 &   2.27 &    166 &  228 \\
  2.0 &   6.3 &   3.7 &   0.6 &   0.87&   0.69 &   6.81 &   0.09  &   0.86 &   2.05 &    152 &  216 \\
  2.2 &   6.7 &   4.1 &   0.5 &   0.89&   0.73 &   6.79 &   0.10  &   0.87 &   1.96 &    141 &  212 \\
  2.4 &   6.9 &   4.5 &   0.4 &   0.90&   0.75 &   6.77 &   0.11  &   0.88 &   1.87 &    131 &  207 \\
  2.6 &   7.1 &   4.9 &   0.2 &   0.93&   0.78 &   6.74 &   0.13  &   0.90 &   1.74 &    123 &  199 \\
  2.8 &   7.2 &   5.2 &   0.1 &   0.96&   0.79 &   6.73 &   0.14  &   0.91 &   1.69 &    116 &  196 \\
  3.0 &   7.3 &   5.6 &   0.0 &   0.99&   0.81 &   6.70 &   0.15  &   0.92 &   1.59 &    110 &  190 \\
\hline 
\end{tabular}
\begin{list}{}{}
\item[$^a$] The surface mass fraction at the onset of
    Roche-lobe overflow divided by the initial mass fraction of
    resp. boron ($^{10}$B + $^{11}$B), carbon ($^{12}$C) and nitrogen
    ($^{14}$N).
\item[$^b$] The equatorial rotational velocity for the primary star,
    averaged over time from the onset of hydrogen burning until the
    start of mass transfer (one before last column) and at the onset
    of Roche-lobe overflow (last column).
\end{list}
\end{table}