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Item type:
Patent
,
Access status:
Open Access
,
Sposób wytwarzania rdzeni odlewniczych opis patentowy nr 39426
(
Urząd Patentowy Polskiej Rzeczypospolitej Ludowej
,
1957-02-18
)
Ratajczyk, Zygmunt
;
Olczak, Feliks
;
Łódzka Fabryka Maszyn
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