  Abundances of 18 elements are determined for the common proper-motion pair,
HD134439 and HD134440, which shows high [Mn/Fe] and low [\alpha/Fe] ratios as
compared to normal halo stars. Moreover, puzzling abundances are indicated from
elements whose origins are normally considered to be from the same
nucleosynthesis history. Particularly, we have found that [Mg/Fe] and [Si/Fe]
are lower than [Ca/Fe] and [Ti/Fe] by 0.1-0.3 dex. When elemental abundances
are interpreted in term of their condensation temperatures (Tc), obvious trends
of [X/Fe] vs. Tc for alpha elements and probably iron-peak elements as well are
shown. The hypothesis that these stars have formed from a dusty environment in
dSph galaxy provides a solution to the puzzling abundance pattern.
