The base layer is polycarbonate plastic. Then an aluminium layer is sandwiched between this base layer and a protective (clear) acrylic coating.
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DVD-RAM and DVD-RW disks are erasable and reusable
They can be used as a base material for computer chips
This means that the drive supports reading and writing to all types of DVD media: DVD-Video DVD-Audio DVD-ROM DVD-R DVD-RW DVD-RAM Also supports the + standards as well. Most basic drives do not support all of these types. Check before you buy.
The red ruby laser is used in standard DVD players to read standard DVD discs. They are now being superseded by the blue laser DVD player, otherwise known as Blue-Ray players and discs.
Velour material is material used to make tracksuits etc.
because that is the material used for tape cases. when we upgraded to CDs, the whole idea was to be compact, so they used the same material they used for tape cases for CD cases, but in trying to be compact, they made the case too thin, and that is why they now always break easily. DVD cases, however, re-invented the case, and DVD cases rarely break. hope that's usefull, blame my tech teacher if its wrong :)
The material is Horse Hair :)
what materials were used to make aboriginal objects
Steel is used.
Cotton was used to make flour sacks.
Its material is stainless steel.
polyester
brass
Rocks.
Cellulose
The most commonly used material to make needles was antler, sometimes bone was used.