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A metal surface becomes dull because of continued abrasion. chemical or physical

A metal surface becomes dull because of continued abrasion. chemical or physical
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A metal surface becomes dull because of continued abrasion. chemical or physical

User Manolis Proimakis
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Physical Change.....!!
User Bryan Lewis
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User LImbus
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A metal surface becomes dull because of continued abrasion physical change or chemical
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