MO S-20.jpg
[[User:Petr Tomasovsky
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MO S 20, MO-Or-S 20 U orla casemate
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MO S 20, MO-S 20 U orla infantry casemate, Orel fortress, Opava District, Czech Republic
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MO S 20
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MO S 20、MO-S 20 オーラ歩兵砲、オレル要塞、オパヴァ郡、チェコ
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