Who invented the ruler?
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Who invented the ruler?

ๅบฆ้‡่กก็š„ๆญทๅฒ้•ทๆฒณไธญ๏ผŒๅฐบ็š„็™ผๆ˜Žๆ˜ฏๆ–‡ๆ˜Ž้€ฒ็จ‹็š„้—œ้ตใ€‚ๅคๅŸƒๅŠใ€ๅธŒ่‡˜ใ€็พ…้ฆฌ็ญ‰ๆ–‡ๆ˜Ž็š†ๆœ‰ไฝฟ็”จๅฐบ็š„็—•่ทก๏ผŒๅ…ถๆผ”่ฎŠ่ˆ‡ๆจ™ๆบ–ๅŒ–๏ผŒๆทฑๅˆปๅฝฑ้Ÿฟไบ†ๅปบ็ฏ‰ใ€ๅทฅ็จ‹็ญ‰้ ˜ๅŸŸใ€‚ ไบ†่งฃๅฐบ็š„่ตทๆบ๏ผŒ่ƒฝๅนซๅŠฉๆˆ‘ๅ€‘ๆ›ดๆทฑๅ…ฅ็†่งฃไบบ้กžๆ–‡ๆ˜Ž็š„็™ผๅฑ•ใ€‚

Who invented the bullet?
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Who invented the bullet?

The invention of the bullet was a key turning point in military history. Who was the first to combine gunpowder and metal to create a weapon that could kill at a distance? Let us explore together and uncover the historical mystery behind this far-reaching invention and understand its impact on war and society.

Who invented the spring bed?
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Who invented the spring bed?

The invention of the spring bed brought revolutionary changes to sleep. Have you ever wondered who first incorporated metal springs into mattress design? How does this innovation affect the quality of our sleep? Letโ€™s explore the history behind the boxspring and learn how it became a staple in the modern bedroom.

When was the alarm clock invented?
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When was the alarm clock invented?

Have you ever wondered when the alarm clock that wakes you up every day was created? Long before the advent of technology, people have been looking for ways to wake up on time. From ancient sundials to complex mechanical devices, the evolution of alarm clocks reflects mankind's desire to control time and the pursuit of efficiency.

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