Objective to study the influencing factors of postoperative atelectasis and the lung-expanding effect of suction method.
目的研究心脏术后肺不张的影响因素及膨肺吸痰法的干预效果。
It firstly heats and softens the plastic sheet and covers it onto the shoetree, then USES vacuum suction method to profile to shape of the shoetree with the plastic foil.
本机将塑料胶片加热软化后，覆盖在鞋楦上，利用抽真空的方法，将鞋楦的形状覆制。
Method is a manual suction grab or metal tin tin absorption line, but low efficiency, easy to damage the board and device.
法是采用手工的吸锡抢或金属吸锡线，但是效率低、容易损伤板子和器件。
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