middle(-)third
3.Bronchoscope found that lesion was located in lower one-third of tracheal in 37 cases,carina in 36 cases,middle one-third of tracheal in 13 cases,upper one-third of tracheal in 7 cases.
8.Methods The T1 weighted, midline, sagittal, spin echo magnetic resonance imaging studies of 1199 patients were assessed to identify the tip of the conus medullaris by using a 1.5T MRI machine. The location was recorded in relation to the upper, middle, or lower third of the adjacent vertebral body or the adjacent intervertebral disc.
9.Abstract: The first and second order contact parameters of a spiral bevel gear drive are precontrolled by using the local synthesis method.Considering the contact pattern and transmission errors on toe,middle,heel contacts,the third order contact shortcomings are eliminated by optimizing the machine-tool settings.The overall control of engagement quality is realized.

