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31. Objective: To study tle changes of the serum ferroprotein (SF) levels in patients with chronic heart failure (CHF), and its clinical significance.

32. Objective To study the mechanism of anti arteriosclerosis of asafoetida acid sodium(SF) so as to provide theory basis for clinical treatment.

33. Objective It is to study the significance of serum ferritin ( SF ) level changes of coronary arteriostenosis disease (CAD) patients.

34. Methods 18 cases of thoracolumbar fractures and spondylolisthesis were treated with SF internal fixations . The entrance point was determined according to the vertebral arch position in X-ray.

35. Allegedly, because of the lip-synch-proof demand from organizers of SF Gala in recent years, some actors decided to quit the Gala due to their singing-off-key during the rehearsal.

36. This paper introduces the principle, characteristics, present state and development prospect of SF 6 auto - expansion circuit breaker.

37. SF series transient surge suppressor could protect the UPS power source system and its load devices.

38. The young tassels (1-1.5cm long)of maize cultured in vitro can develop in three ways, budding directly (B) , non-embryogenic or non-morphogenetic callus (SF) , and embryogenic Ellus (E-l) .

39. Conversely, an increased SF level does not necessarily mean iron overload.