NH fuses (also known as NH Knife Blade Fuses or DIN NH Blade Fuses) were defined in the German DIN standard 43620 around 1944. They were primarily designed as general purpose fuses for the protection of conductors. NH fuses are one-time fuses, meaning once they have blown, they must be replaced with a new fuse with the same characteristics.
http://www.wzcfdq.com/nh-fuse-....links-and-bases/nh-f

And if sensor magnets are installed on mines or mines, since tanks or warships are made of steel, when they are close (without touching the target), the sensors can detect changes in the magnetic field and cause the mines or mines to explode, increasing the lethality.
http://www.neodymiummag.com/ne....odymium-magnets/sens

What benefits makes Paint by Numbers for kids is that it will enhance their development. One main reason is that drawing and coloring are activities that develop a child's motor skills. The game develops their coordination skills since it teaches them to coordinate certain colors with numbers.
http://www.kshomediy.com/paint....-by-numbers/paint-by

The portable balancer has embedded computer technology and dynamic balancing technology, and has many functions such as on-site vibration data measurement, vibration analysis, and single- and double-sided dynamic balancing. It is simple and easy to use.http://www.kmvibrationanalyzer.....com/portable-balanc

Boxes are divided according to packaging materials: paper gift boxes, plastic gift boxes, metal gift boxes, bamboo and wood packaging, glass containers and composite materials, etc. Generally, gift boxes are mostly packaged in paper, which is related to Chinese traditional culture and advocates green packaging. Paper is undoubtedly the most appropriate choice, and the recycling rate of simple packaging waste from production and processing is also high.
http://www.ipackagingbox.com/p....aper-box/paper-gift-