PV fuses are utilised to protect solar power gathering equipment against overcurrents, reserse currents and short circuits that can occur within alternative energy gathering PV string installations. Photovoltaic (PV) fuses vary in a number of different ways including fuse speed, voltage and amperage rating, breaking capacity and their physical size and shape. Photovoltaic fuses have the following superior properties: 1. Comprehensive protection: PV fuses can effectively break down to 1000Vdc.
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Types of magnets: Shape magnets: square magnets, tile magnets, special-shaped magnets, cylindrical magnets, ring magnets, wafer magnets, bar magnets, magnetic frame magnets, attribute magnets: samarium cobalt magnets, ferrite magnets, AlNiCo magnets, FeCrCo magnets, industrial magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, etc. Magnets are divided into permanent magnets and soft magnets.
http://www.neodymiummag.com/ne....odymium-magnets/moto

Paint by numbers is a system where a picture is divided into shapes, each marked with a number that corresponds to a particular color. You paint in each shape and ultimately the picture emerges as a finished painting. The paint by numbers approach is often ridiculed as being simplistic, uncreative, and formulaic. I believe it's helpful in getting across the concept that a painting is built up through multiple shapes of color.
http://www.kshomediy.com/paint-by-numbers/

Vibration meter is an instrument used to directly indicate the peak value, peak-to-peak value, average value or root mean square value of vibration quantities such as displacement, velocity, acceleration and acceleration derivative. The main parts of this instrument are integral and differential circuit, amplifier circuit, voltage detector and meter. The integral and differential circuit is used to complete the integral and differential operations between the above-mentioned vibration quantities.
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The paper box is a three-dimensional shape, which is composed of a polyhedron formed by moving, stacking, folding, and surrounding several surfaces. The faces in the three-dimensional composition play the role of dividing the space in the space. If the faces in different parts are cut, rotated, and folded, the obtained faces have different emotional expressions. The composition relationship of the carton display surface should pay attention to the connection relationship between the display surface
http://www.ipackagingbox.com/paper-box/