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gamer_pkx358

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00:00During World War II, many bombs had a small propeller on the front.
00:03But why?
00:04The propellers served as arming timers.
00:06As the bomb was released, its safety pin was pulled, and the propeller began spinning.
00:11The rotational energy created a screw-like motion.
00:14Once the striker was freed, it struck the primer.
00:17Police ensured safe detonation.
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