Cut through with an electron beam to determine the material composition inside.
Chip of brass with impurities of lead - copper, tin, plumbum, carbon, oxygen
Particle of tin - tin, oxygen, carbon, copper
Chip of tin - tin, oxygen, carbon, copper
Particle of tin - tin, oxygen, carbon
Particle consisting of copper and tin. Thin bronze sheet metal is often used for electrical pins!
metallic Particle of iron, manganese, chrome and carbon (chip of iron, low alloyed steel)
metallic Particle of iron, silicon and carbon (chip of iron, alloy of silicon, magnetically soft steel FeSi)
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