短语词组短语tissue retractor 组织牵开器;翻译;组织牵开器英语spinal retractor 脊柱牵开器shoulder retractor 肩膀牵开器bladder retractor 膀胱牵开器bone retractor 骨拉钩malleable retractor 可伸展牵开器scalp retractor 头皮拉钩;头皮牵开器retractor hook 形牵开器bulb retractor 球茎牵开器 返回 retractor