Verfahren zur grossflaechigen Sicherung des im Zuge des Verhiebsfortschrittes freigelegten Hangendbereichs in Abbaubetrieben

摘要

1,168,794. Mine roof supports. K. M. GROETSCHEL. 21 April, 1966 [21 April, 1965], No. 53966/66. Divided out of 1,168,792. Headings E1E and E1P. The subject matter is the same as that of Specification 1,168,792 but the claims are directed towards the additional support urging the long beam, extending from the superstructure, upwards.