FIELD FORTIFICATIONS (MILITARY ENGINEERING)
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BTFORTIFICATIONS (MILITARY ENGINEERING)
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UDC623,022.12
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Descriptor GERFELDBEFESTIGUNGEN (WEHRTECHNOLOGIE)
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Descriptor ENGFIELD FORTIFICATIONS (MILITARY ENGINEERING)
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Descriptor FRETRANCHÉES + FORTIFICATION DE CAMPAGNE (GÉNIE MILITAIRE)
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Variant GERSCHÜTZENGRÄBEN (WEHRTECHNOLOGIE)
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Variant GERVERTEIDIGUNGSWERKE (WEHRTECHNOLOGIE)
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Variant GERSCHANZEN (WEHRTECHNOLOGIE)
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Variant ENGTRENCH WORKS (MILITARY ENGINEERING)
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Variant ENGDEFENCE WORKS (MILITARY ENGINEERING)
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Variant ENGDEFENSE WORKS (MILITARY ENGINEERING)
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Variant ENGTRENCHES (MILITARY ENGINEERING)
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Variant ENGSIEGE WORKS (MILITARY ENGINEERING)
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Variant FREFORTIFICATIONS DE CAMPAGNE (GÉNIE MILITAIRE)
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NTFIELD OBSTACLES + FLOODING (MILITARY ENGINEERING)