الصفحة الرئيسية > Term: attendance signaling system
attendance signaling system
A signaling system that operates between the surface lamp room and the underground office, indicating the workers in attendance at the beginning of the shift.
- قسم من أقسام الكلام: noun
- المجال / النطاق: التعدين
- الفئة: تعدين عام; Mineral mining
- Government Agency: USBM
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المنشئ
- ed.young
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(Milwaukee, United States)