A proximity sensor often emits an electromagnetic or electrostatic field, or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal.
一个接近性传感器通常会发出电磁或静电场，或电磁辐射光束(例如红外)，以及在外地或返回信号的变化看。
The confinement_potential of point charge in electrostatic field requests anti_dielectric or mirror line of arranged free point charge out of confined region.
证明了静电场中点电荷的禁闭条件是禁闭区外部为抗电介质，或者在禁闭区外排布镜像点自由电荷系列线。
It proved that the high voltage electrostatic drying technology has certain prospect in the field of immune milk production, however, it still need some improvement in the process or on the equipment.
这一结果说明了高压静电干燥技术在免疫初乳制品的生产上有广阔的应用前景。
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