What should I look out for when buying an e-racing bike?

An e-racing bike remains a special case with many rough edges. If you regularly use your bike…

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Industrial use of board inspection equipment

We will explain the outline, applications, principles, etc. of the board inspection equipment. What is a…

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Image format (or aspect ratio) in composition

Composition is a fundamental aspect of photography, which is however very little taught, or very badly.…

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