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A B C D E F G H I J K L M N P Q R S T U V Z [ เทคโนโลยี ( Technology ) ] back |
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T T1 T2 T3 T5 T6 TA TC TD TE TF TG TH TJ TK TL TN TP TR TS TT TX |
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TN1 TN2 TN3 TN4 TN6 TN7 TN9 |
| LC | คำอธิบาย | ||||||||
| Mineral deposits. Metallic ore deposits. Prospecting | |||||||||
| Practical mining operations. Safety measures | |||||||||
| [แสดง 2/2 รายการ] | |||||||||