Weld identification single hole punch. 鑒別焊縫的單孔沖壓機。
BHID with two tubes in one hole can be used as the primitive method in CSDH in adolescent with its merits on quickly-recuperation and slightly-traumatic. 單孔鉆顱置雙管沖洗引流術(shù)創(chuàng )傷小，療效明確，恢復快，可作為青年人慢性硬膜下血腫的首選治療。
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