Which three-person pull-up trainer is of better quality in Hebei?

Which three-person pull-up trainer in Hebei has better quality? The three-person pull-up trainer is: Pull-up is a widely used and effective training method. The latissimus dorsi is one of the parts that bodybuilders focus on training. Its degree of development has a great relationship with bodybuilding. In other words, when the latissimus dorsi muscles are strong and developed, the entire back will look like a font. There are many training methods for developing the latissimus dorsi and trapezius, teres major, teres minor, rhomboids, infraspinatus and other back muscle groups.
The movement process of pull-ups is very simple. Hold the horizontal bar with both hands wide, straighten the arms, hang the body, relax the lower back, and straighten or cross the calves. Then, while inhaling, use the contraction of the latissimus dorsi to bend the arms and pull up until the lower jaw (chin) exceeds the bar or the back of the neck is close to the bar. After a short pause, while inhaling, use the strength of your latissimus dorsi to control your descent slowly until you recover.
Cangzhou Xinhe Sports Equipment Co., Ltd. produces three-person pull-up trainers, manufacturers of new national standard three-person pull-up trainers, plastic wood three-person pull-up trainers, waist and back extensions, three-position traction devices, sit-and-push trainers, and sit-down trainers. Pull training device, three-position waist twister, shoulder joint rehabilitation device, children's swing, Tai Chi pusher, treadmill, elastic leg press, inversion stand, leg massager, back extension frame, single column double abdominal Muscle board, disc-type three-position waist twister, single-column children's swing, combination climbing slide, sitting thruster, press training device, single-person fitness riding machine, double-person fitness riding machine, double-person walking machine, four-person walking machine, double-person walking machine Mountain bike,