词汇	杜学
释义	杜学 dù xué見杜義。
随便看	center curve survey center cut center-cut center cut loin center cutter center cutting center cylinder of gear pins Center cylinder of pin holes Centerdale center databank center database center datum center deep tank center-deflection-measure center dent center depth regulator center design center deviation center diameter of gear pins center diameter of pin holes center differential center-diffusion tube gas burner center dipole field center dipole magnetic field Center director