Spirofluorene derivative, material for light-emitting element, light-emitting element, light-emitting device, and electronic device.
螺芴衍生物，发光元件用材料，发光元件，发光设备和电子设备。
Oil-retaining bearing, friction material, (soft and hard) magnetic element, electronic ceramics, electrical alloy, etc.
含油轴承、擦材料、软、性元件、子陶瓷、工合金等。
The invention provides an electronic element with a mixed high dielectric material layer and the manufacturing method thereof.
本发明提供一种具有混合高介电材料层的电子元件及其制造方法。
The invention relates to recycle and reuse technology of electronic castoff, in particular to a method and a device to remove the element and separate the welding material from the circuit board.
本发明涉及电子废弃物的回收再利用技术，特别涉及一种从电路板上拆卸元器件和分离焊料的方法及装置。
The invention relates to recycle and reuse technology of electronic castoff, in particular to a method and a device to remove the element and separate the welding material from the circuit board.
本发明涉及电子废弃物的回收再利用技术，特别涉及一种从电路板上拆卸元器件和分离焊料的方法及装置。
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