character: Mr. Tom Johnson
topic: Industrial Uses of Argon in Welding
grade: 12
subject: Chemistry
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character: Dr. Sarah Thompson
topic: Gases Used in Welding Processes
grade: 12
subject: Chemistry
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character: Engineer Mike Rogers
topic: Advantages of Noble Gases in Welding
grade: 12
subject: Chemistry
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character: Researcher Emily Carter
topic: Chemical Properties of Argon and its Applications in Industry
grade: 12
subject: Chemistry
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