The clistressed cow frequently attempts urination and pulsates the urethra over the ischial arch .
病牛频频企图排尿，坐骨弓上的尿道发生搏动。
Repairing refractory bedsores on ischial tuberosisties with the long head of biceps femoris tendon muscle flap and inferior semi gluteus maximus musculocutaneous flap .
