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Improvements in the construction of tunnels for lower steps of pedestrians in road transport lines. (Machine-translation by Google Translate, not legally binding)
Improvements in the construction of tunnels for lower steps of pedestrians in road transport lines. (Machine-translation by Google Translate, not legally binding)
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机译：改善公路运输线路中行人下层隧道的建设。 （通过Google翻译进行机器翻译，没有法律约束力）
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摘要
Improvements in the construction of tunnels for pedestrian underpasses in road transport lines, characterized by the fact that only a slight excavation is needed in the support box of the track, carried out in the normal direction to the direction of circulation, with a general depth of a seated person and of a directional width capable of allowing the passage, in both directions, of a conveyor belt of two to three squares to which is added two mouth boxes of sufficient capacity to allow easy access to the conveyor belts and the game, in time, to take the sitting position. (Machine-translation by Google Translate, not legally binding)
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