地佐辛在股骨颈骨折手术椎管内麻醉体位摆放时的镇痛效果观察
지좌신재고골경골절수술추관내마취체위파방시적진통효과관찰
Observation of Dezocine's analgesic effect in putting body position of intraspinal anesthesia in the femoral neck fracture surgery
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