The inner structure and operating principle of non-contact magneto potentiometer are described. The noncontact magneto potentiometer is one of the main parts of the electrocardiographic magnetic sensing position feedback recorder, which is important for the electrocardiograph to operate normally. If magneto potentiometer has any problem, it will result in some faults. Based on the analysis about the common faults, static method and dynamic method are provided. At last, some suggestions and reference are presented for detection and maintenance.

The development and present situation of high power and luminous flux LED is introduced. The feasibility of high luminous flux LED in the field surgery illumination is analyzed in detail. Then the realizable plans are discussed separately from device, driving circuit, optical system and mechanical system.

[Objective]To research the effect of acetic ether extract from T. ramosissima on the skin-wounded mice. [Methods]The acetic ether extract of T. ramosissima was administrated to skin-wounded mice by gavage methods. [Results] The experimental groups in different dosages had significant difference ,compared to the control group, with the areas of wound healing 17.68 mm2, 17.90 mm2, 20.18 mm2 and 31.48 mm2,after the acetic ether extract of T. ramosissima administration to skin-wounded mice by gavage methods. [Conclusions] It was suggested that the acetic ether extract of T. ramosissima had some protective effects on improving the wound healing.