Government device for variation of the length of the active surface of the combination of a tunneling machine. Automatic lifting device of the tundidor group. (Machine-translation by Google Translate, not legally binding)

摘要

Automatic lifting device of the tunding group or the tunding groups of a tunding machine, characterized in that it comprises a feeler group acting on the entire width of the fabric, a pneumatic lifting group and a steering timer device. (Machine-translation by Google Translate, not legally binding)