Difference between inverted metallographic microscope and upright metallurgical microscope
Inverted metallurgical microscope: it is mainly used for research and analysis of the structure of various metals and alloy materials, the quality of castings, and the phase structure after heat treatment. It is an indispensable instrument for metallurgical research. The inverted surface of the sample is not restricted by height , As long as one observation surface is flat when preparing the sample. Therefore, factory laboratories and scientific research institutions are generally used for teaching. Other industries such as electronic products, films, and coatings are made of cold mosaic materials and placed directly on the worktable. The transparent materials can also be easily observed. The camera can be easily connected to the video screen and the computer for real-time and static and dynamic image observation, storage and editing, printing, and various software. It can carry out more professional metallography, measurement, and interactive teaching needs.
The upright metallurgical microscope has the same basic functions as the inverted metallurgical microscope. In addition to the analysis and identification of metal samples of 20-30mm height, it is more widely used in transparent, translucent or opaque because it conforms to people's daily habits. substance. Observation targets greater than 3 microns and less than 20 microns, such as cermets, electronic chips, printed circuits, LCD substrates, films, fibers, granular objects, coatings, and other surface structures and traces, can have good imaging effects. The camera system can be conveniently connected to the video screen and the computer for real-time and static and dynamic image observation, storage and editing, printing, and various software. It can be used for more professional metallography, measurement, and interactive teaching needs.
Tea and coffee are two drinks of the largest consumption in the world. Coffee is irreplaceable in the lives of westerners, whether it is in schools, companies or shopping arcade, people carry coffee and find pleasure in it. However, tea is not only a drink in Chinese people`s life, but also carries human emotions and culture. Tea and coffee, which have different connotation and history, are representative of the differences between Chinese and Western culture.
The species and brewing methods of tea and coffee exists differences, too. To brew coffee, there are strict requirements from grinding coffee beans to implements as well as water temperature proportion. The brew will taste strong and aromatic.
Tea needs more complex process than coffee to brew. There are several species of tea including green tea, bohea, white tea, oolong tea, jasmine tea. Each type of tea processing is not the same. The Tea Set is also rich in variety. Different tea accompanied by different tea things so as to better reflect the flavor of the tea.
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