General specification of pan tilt head for nbtv camera 应用电视摄像机云台通用技术条件
2.
Sit upright and don t tilt head backward 要坐直，头部不要向后仰
3.
Hanging power , seize and hold , slightly tilted head , pulled up buttocks , iron ruler waist , curved back , dropping the shoulders and elbows , keep the chest in and curve the back 悬吊索、擒拿揸捉、千字头、蛙仔膝、 ?尺腰、筲箕背、沉肩堕肘、含胸拔背。
