| 摘要 |
This invention relates to a suspension railroad in mines, including a monorail having an elongated friction section and an elongated rack section located above the friction section, a car suspended on the monorail and driven for moving the car along the rail including a friction wheel in frictional engagement with the friction section, a gear wheel coaxial with the friction wheel, and a shiftable device for moving the gear wheel into and out of engagement with the rack section.
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