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Features of yellow laser pointer

Yellow laser pointer is a kind of laser pointer. Because it emits yellow light, it is called yellow laser pointer, and some are called yellow laser pointer. It is relative to the green laser pointer, but regardless of performance or use It is not as good as the green laser pointer, and the market retail price is much lower. It is suitable for middle and low-end consumers and can also achieve the functional effect of a laser pointer. Features: Quantum well LD as light source, CW and MOD working modes, FC, SC, ST common interface, long detection distance, stable power output, output of red laser visible to the human eye. Strong penetrating power, light transmission at fault points The PVC layer is still clearly visible after 3mm, nano-technology multiple electrostatic protection, sturdy and durable shell, pen-shaped design, easy to carry and use.

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Introduction to nofollow, application and tips in SEO optimization

nofollow is an attribute value of an HTML tag. Its appearance provides a way for webmasters to tell search engines “don’t follow the link on this page” or “don’t follow this specific link”. The meaning of this tag is to tell search engines that this link is not edited by the author, so this link is not a trusted link. Let’s learn about the nofollow tag with the editor of the super ranking system.