The ballute consists of a ballute cover and ropes, and the ropes are respectively connected with the sliding axle in the chute and the pull rod in the semicircular arc-shaped pull rod bracket.
气伞由伞罩、绳索组成，绳索分别与滑槽内滑动轴和半圆弧形拉杆架内拉杆连接。
Conclusion: the attention would be played to the influence of the roughness and abrasion of the bracket slot area on friction and anchorage control in using sliding mechanics.
结论：使用直丝弓矫治技术时，应重视托槽表面粗糙、磨损对摩擦力的影响，注意支抗控制。
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