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PN LED
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PN LED
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homostructure pn junction LED
PN LED
pn结LED指基于pn结构的发光二极管,具有p极和n极两级。在适当的正向偏置电压下可以发光,属于自发辐射。pn结LED有同质pn结和异质pn结。同质pn结是指材料相同,但导电类型不同的材料形成的pn结。
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Medical Subject Headings
medical supervision for submarine escape
medical supplies support
medical support for astronaut
medical surgical and diagnostic microscopic devices
medical suture needle(without thread)
medical sutures
medical textiles for extracorporeal applications
medical therapy of tumors
medical train
medical training for astronaut
medical treatment
medical treatment and evacuation of the sick and wounded
Medical treatment and medication management of medical insurance
medical treatment devices under low temperature
medical treatment equipment for contamination ofuclear,chemical and biological agents
medical treatment in echelons
medical treatment institution of chemical poisoning
medical treatment institution of infectious diseases
medical treatment institution of nuclear radiation
medical treatment of radionuclide internal contamination
medical ultrasound
medical ultrasound devices ang attached devices
Medical union management
medical virology
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