The double-track type external fixed bracket mainly comprises a power connecting rod with threads, a sliding connecting rod without threads, 4-6 sliding bodies and an ear-shaped body.
主要由带螺纹的动力连接杆、不带螺纹的滑动连接杆、4～6个滑动体和耳状体组成。
2
The fixing element adopts a screw rod and a thread component which are connected with the bottle bodies respectively.