For most vertical wellbores, inclination is the only measurementof the path of the wellbore.
对于大多数直井，倾角其实也只是对井眼轨迹的测量。
2
Methods: Adopting constitutional principle and measurement method of improved pelvic inclination surveyor, compared with other measurement methods of pelvic inclination.
方法：采用改良骨盆倾斜度测量器结构的原理和测量方法与其它测量方法进行比较性研究。
3
Exhaustive discussion about the measurementof the optical values, namely, rotating Angle, inclination Angle and compensation Angle, under illuminating the model by linear or circular polarized light.