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31. The women built battery-powered direct current lamps to replace kerosene lanterns widely used in local homes—a known source of indoor air pollution.

32. If a direct current electric field was applied to a polluted soil, the contamination would be motivated in a different way by the electroosmosis and electromigration.

33. The product widely is suitable for electrical machinery electric appliance's and so on generator, direct current motor, pulling motor, transformer and metallurgy profession insulations .

34. Firstly, a whole design project, that a direct current motor and a harmonic drive reducer are used to drive the actuator is determined.

35. A kind of xenon lamps stabilizer is designed which is made up of the tripper-circuit with two-leveled rising voltage and the direct current power circuit with frequency conversion mode.

36. It can be obtained the trace to the source of large direct current with self-balancing DC comparator through self-calibration circuit, addition circuit, compare circuit and multiplication circuit etc.

37. The disturbance resistant of LH coil and the circuit structure of analogue electronic switching matrix, integrator, direct current detector are especially studied.

38. Two Critical concepts involved in direct current ice-melting technique of high voltage over head line, the least ice-melting current and the max allowed current was presented.

39. The constant direct current - stimulation can accelerate the growth and induct tendency of cells.

40. Its application to permanent magnet direct current motor design expert system verifies its validity and effectiveness.

41. The design of DC(Direct Current)Disk Electromagnetic Brake ensures high brake moment and quick reliable braking with little noise.

42. The utility model relates to a direct current forcipate ammeter.

43. Combined with the problems during the experiment, design a improved testing circuit of Direct Current Attenuation Method.

44. The paper discusses the design of double closed loop regulation system of speed and current and establishes the mathematical model of brushless direct current motor.

45. The break of direct current main in cyanuramide product happened for many times and it had been influenced the usual product. The faults were analysed and the improvement measures were given.

46. The equipment to economize electric power adopts direct current supply, which comes from 220V/10V 2W transformer, then commutes and passes through Manostat 7812.

47. Synchronous motor excitated magnet by direct current can make output mechanism specialities matched load specialities by means of adjusting exciting current to change magnetic field and power factor.

48. The process of N 2 discharge in direct current electric field is simulated by Monte Carlo method.

49. This article introduces design principle and making method of self making teaching aids of simple direct current motor, it provided perceptive materials for students to understand motor's principle.

50. In order to solve the problem, the disturbance state observer and direct current control system with feed forward compensation are designed.

51. Then it elaborates the merit of direct current electric arc of discharge.

52. Methods 78 patients were converted to sinus rhythm by oral quinidine or amiodarone or direct current cardioversion.

53. Direct Current Injection as a substitute for direct illumination of the missile in free space is assessed on the basis of results.

54. The testing device of direct current injection is manufactured and tested in space-time and frequency.

55. The switch element generates an alternate current voltage having a quasi-higher frequency from a direct current voltage.

56. A non-contact direct current sensor with a permalloy core and Mos-FETs based on the principle of the magnetic multivibrator has been designed.

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57. A calculation method based on the concept of "senary" is presented, to start up a contra-rotative rare earth permanent magnet brushless direct current motor (CR REPM BLDCM).

58. A pilot study is showed with the principium of sending set and receiving set for non-wires remote control and with direct current motor's both direction control with H-bridge.

59. This text introduce a verified method of direct current high voltage supply source making use of digit multimeter and voltage ratio standard in high voltage and high resistance measure instrument.

60. A direct current plasma spray gun was designed in which separation sections were set between anode and cathode to restrict the large-scale diffluence of arc.