目的探讨16层螺旋CT血管造影（CTA）对颅内动脉瘤的诊断价值，以及对动脉瘤夹闭术后评价其指导价值。

Objective To assess the values of 16 slices CT angiography (CTA) in the diagnosis and postoperative follow-up of intracranial aneurysms after clip.

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本发明涉及一种螺旋输送机前后管体焊接装置，其特征是由装夹和传动两部分组成；

The invention relates to a front and rear tube welding device for a spiral conveyer, which is characterized by consisting of two parts, namely a clamping part and a transmission part.

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撑衣框的一边通过圆柱螺旋扭转弹簧的中心孔贯穿在大、小弧夹片的通孔中。

One side of the clothes-supporting frame passes through the centre hole of the cylindrical helical torsion spring to permeate in the through holes of the big arc clip and the small arc clip.

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