管型吻合器在套叠外翻肛门外切除治疗低位直肠癌保肛术的应用
관형문합기재투첩외번항문외절제치료저위직장암보항술적응용
The Application of Tube-typed Stapler in Anus-saving Operation for Patients with Low Rectal Cancer through Pull-out Resection
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