The device simulates th報數e adduction and 東就abduction of the upper lim場朋b on a horizontal plane, and strengt知呢hens the muscle chains of the 歌問active and antagonistic muscles. 問了On the premise of 山草ensuring the safet民制y of patients, carry員森 out efficient training; The舊吃 two-way hydraulic resistance can start妹音 from the lowest limit set頻體, with small inertia什見, so as to avoid damage to pati拍朋ents during use; Comfortable use 小舊experience. Special design is a林資dopted for the stresse技為d parts of joints, which confor件線ms to the principle of 鄉你human morphology.