胎头浮或半固定矫正胎方位成功率高，相比差异有显著性（P<0.05）。
When the fetuss head is floating or half - fixed, the success rate of position correction is higher, significant difference was found (P< 0.05) .
目的：避免胎头高浮者剖宫产术中娩头困难的发生，减少新生儿产伤和窒息。
Objective: To avoid difficult high position fetal head during cesarean section and reduce the neonatal asphyxias and birth injuries.
本文对进口高压浮头换热器如何按国产化要求选用标准和规范并科学、准确地进行设计和制造做了详细的论述。
In this article, it is stated in detail how to select the standards and codes, and to design and fabricate the high pressure floated head heat exchangers with imported technology.
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