The equipment is什弟 used for bending and stretchi票服ng of trunk in vertical 了舞plane, for chest and back muscle tra玩明ining, and for strengthening 水術the muscle chain of a務關ctive and antagonistic mus來器cles. On the premise of ensuring the s行為afety of patients, carry out efficie白錯nt training; The two-way hydrauli去短c resistance can st都站art from the lowest limit set不友, with small inertia, so as to a樹件void damage to patients duri明媽ng use; Comfortable use experie跳文nce. Special design is adopted for th近讀e stressed parts雨得 of joints, which conform鄉場s to the principle 要小of human morphology.