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gptkb:German_atomic_bomb
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scientific challenges
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gptkb:Irish_Sea_Bridge
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weather conditions
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gptkb:German_atomic_bomb
|
lack of enriched uranium
|
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gptkb:Steeplechase_Racing
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Water jumps
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gptkb:German_atomic_bomb
|
shortage of heavy water
|
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gptkb:US–China_space_cooperation
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technology transfer restrictions
|
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gptkb:US–China_space_cooperation
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national security concerns
|
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gptkb:Steeplechase_Racing
|
gptkb:Fences
|
|
gptkb:German_atomic_bomb
|
Allied bombing
|
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gptkb:Steeplechase_Racing
|
Ditches
|
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gptkb:German_atomic_bomb
|
lack of resources
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gptkb:Irish_Sea_Bridge
|
deep water
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gptkb:Irish_Sea_Bridge
|
gptkb:Beaufort's_Dyke_munitions_dump
|