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[ เทคโนโลยี ( Technology ) ]
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ลำดับที่
LC
คำอธิบาย
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Mining engineering. Metallurgy
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Mineral deposits. Metallic ore deposits. Prospecting
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Practical mining operations. Safety measures
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Mine transportation, haulage and hoisting. Mining machinery
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Ore deposits and mining of particular metals
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Metallurgy
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Nonmetallic minerals
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Building and ornamental stones
[แสดง 8/8 รายการ]