copper wire
copper alloy
copper pipe
copper sulfate
copper mine
copper ore
copper tube
copper powder
copper clad
copper foil
copper plating
pure copper
jiangxi copper
copper plate
copper concentrate
copper oxide
electrolytic copper
copper content
red copper
copper strip
a flexible copper braid.
I'm not a copper's nark.
a reel of copper wire.
Copper wire is flexible.
a crucifix of copper
exploitation of copper deposits.
the young copper swung a terrific right.
long runs of copper piping.
Copper is a good conductor of electricity.
Copper is a good conductor of heat.
Copper conducts electricity well.
Brass is an alloy of copper and zinc.
Experiment on determination of trace Argentum in copper coneentrace ore was done.Method of inhibition of Copper to determine Argentum was studied.
Experiment on determination of trace Argentum in copper concentrace ore was done.Method of inhibition of Copper to determine Argentum was studied.
A one-cent copper coin could be exchanged for three copper coins.
Aurubis, Europe's largest copper producer, is also the world's largest copper recycler.
The entire building is shielded in copper mesh.
A small pair of shoes with copper tips!
Unlike copper cables, which transmit electrical energy, fiber optic cables transmit light.
Think of it as copper being a crossing guard.
And blue green came from copper.
This wire is made of copper.
Until about 1902, legal food preservatives included chemicals like formaldehyde, borax and copper sulfate.
The archeologists found some ancient copper coins in the tomb.
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