Home > Term: buraco de Jack
buraco de Jack
Eng. em mineração de carvão, uma bolthole.
- ส่วนหนึ่งของคำพูด: noun
- อุตสาหกรรม/ขอบเขต: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- Azinhais
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