mine entrance

释义

矿井口，井口；

Mine Entrance
Winter Activity of Bats at a Mine Entrance in Vermillion County, Indiana
Are External Mine Entrance Characteristics Related to Bat Use?
Approaching the electric closedown system among the mine entrance's equipment for vertical shaft cage hoisting
Sally Barnard inside Mine entrance safety stop on Wasatch Mountain Club trail
[View of Mount Morgan, Queensland, showing trucks coming out of mine entrance] [picture] /
Construction Scheme Design of Negative Pressure Ventilation System for Second-Stage Project of One-Entrance Mine in Xinji No.1 Coal ...
[Eight unidentified miners at mine entrance with two ore cars, New South Wales] [picture] /
Mine entrance in the Redwall limestone, east side of Horseshoe Mesa, Grand Canyon National Park.
Mine entrance? in the Cascades, probably Marion County, Oregon