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Most elements need to be concentrated into amounts that can be economically mined from ore deposits (usually hundreds to thousands of times their crustal abundance)....

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PetroSeis Malaysia

Petroseis is formed by a group of highly skilled professionals with vast experience in the marine geophysical and hydrographic survey. Our management and operation ......

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How tin is made

Tin is one of the basic chemical elements. When refined, it is a silvery-white metal known for its resistance to corrosion and its ability to coat other metals....

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