strong room
5.She was rather more concerned with her appearance than with the strong-room key, so he pushed home his advantage and took the key.
7.Sodium bismuth titanate, (Na_1/2Bi_1/2)TiO_3(NBT), is a kind of perovskite-type ferroelectric with a relatively large remnant polarization at room temperature and a relatively high Curie temperature(T_c =320℃). For its strong ferroelectrics at room temperature, NBT has been considered to be a promising candidate material for lead-free piezoelectric ceramics.
8.ACOUSTIC DESIGN FOR STRONG-ABSORPTION AND SHORT-TIME REVERBERATION RECORDING ROOM

