tability to the vehicle. chine is built to undercut 5 feet deep and 44 inches The front wheels are narrower in gage, in order to wide. It can be used in different veins of coal varying allow sharp locking for turning corners with precision in thickness from 2 to 3 feet, as the height of the ma- and… … until the entire width of the room is un- be the case if the vehicle were carrying ammunition or stores. The movements dercut 5 or 6 feet deep. After the ma- chine is started, it continues tu advance of the flaps are actuated from the steel room to work ; but where the veins are very low, the ribs…
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