目前的井眼轨迹方位角测量技术主要靠磁通门传感器，这种技术受地磁场及测量体周围金属管体的制约。
At present, hole trajectory azimuth Angle is measured mainly with magnetism sensor, but which is restricted by magnetic field and the metal tube around the surveying equipment.
通过确定球心位置，对炮身管的高低角、方位角进行计算，从而检测火炮调炮的性能。
By the sphere centre, elevation Angle and azimuth Angle of the gun barrel are obtained.
结果，83式精度尤其在方向(方位)散布的项目上比其它的发射武器系统，像是传统的管式火炮更加低。
As a result, the Type 83's accuracy especially in term of directional (azimuth) dispersion is much lower than other projectile weapon systems such as traditional tube artillery guns.
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