6 Glass GM. Prevention of recurrent saphenofemoral incompetence after surgery for varicose veins. Br J Surg , 1989 , 76 7赵军,董国祥.应用聚四氟乙烯戴戒治疗原发性下肢深静脉瓣膜功能不全.临床外科杂志,1997,5:156-157.
Remove the cover and diaphragm. The relief valve piston assembly can be lifted straight up and out.拆卸阀盖和隔膜。安全阀活塞总成可以笔直提出到外面来。