PL74544B2 - - Google Patents

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Publication number
PL74544B2
PL74544B2 PL15263171A PL15263171A PL74544B2 PL 74544 B2 PL74544 B2 PL 74544B2 PL 15263171 A PL15263171 A PL 15263171A PL 15263171 A PL15263171 A PL 15263171A PL 74544 B2 PL74544 B2 PL 74544B2
Authority
PL
Poland
Prior art keywords
sleeves
stands
spherical
rotating
props
Prior art date
Application number
PL15263171A
Other languages
English (en)
Polish (pl)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to PL15263171A priority Critical patent/PL74544B2/pl
Publication of PL74544B2 publication Critical patent/PL74544B2/pl

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  • Earth Drilling (AREA)
PL15263171A 1971-12-31 1971-12-31 PL74544B2 (cs)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15263171A PL74544B2 (cs) 1971-12-31 1971-12-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL15263171A PL74544B2 (cs) 1971-12-31 1971-12-31

Publications (1)

Publication Number Publication Date
PL74544B2 true PL74544B2 (cs) 1974-10-31

Family

ID=19956914

Family Applications (1)

Application Number Title Priority Date Filing Date
PL15263171A PL74544B2 (cs) 1971-12-31 1971-12-31

Country Status (1)

Country Link
PL (1) PL74544B2 (cs)

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