To enhance the sealing effect and improve the quality of products.
为了加强二极管的焊接效果，提高产品质量。
Infants; Intravenous catheter system; Sealing liquid; Sealing effect; Retention time.
婴幼儿；静脉留置针；封管液；封管效果；留置时间。
The experiments show that coil position and voltage have larger influence to the sealing effect.
试验结果表明：线圈位置，电压对封口效果影响较大。
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