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عصور

795 مخططات متاحة • 16 فئات فرعية

المخططات (795)

Building a Figure-4 Deadfall Trap — Stone Weight Trigger Mechanism

Building a Figure-4 Deadfall Trap — Stone Weight Trigger Mechanism

بواسطة BobBE

ما قبل التاريخ

21
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Setting a Simple Snare Trap on a Game Trail — Cordage Loop Hunting

Setting a Simple Snare Trap on a Game Trail — Cordage Loop Hunting

بواسطة BobBE

ما قبل التاريخ

27
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1
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Drying Medicinal Herbs for Winter Storage — Preserving Nature's Pharmacy

Drying Medicinal Herbs for Winter Storage — Preserving Nature's Pharmacy

بواسطة BobBE

إسعافات أولية

26
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3
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Preparing a Yarrow Wound Poultice — Prehistoric Herbal First Aid

Preparing a Yarrow Wound Poultice — Prehistoric Herbal First Aid

بواسطة BobBE

ما قبل التاريخ

23
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5
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Building a Coil Pot by Hand — Ancient Pottery Without a Wheel

Building a Coil Pot by Hand — Ancient Pottery Without a Wheel

بواسطة ClayDK

خزف وطين

26
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بناء منضدة عمود لتحويل الخشب الأخضر — منضدة عمود مرن متبادلة

بناء منضدة عمود لتحويل الخشب الأخضر — منضدة عمود مرن متبادلة

بواسطة WoodyNO

العصور الوسطى

68
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Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

بواسطة BobBE

Industry 2.0 — Electricity, Steel & Oil (1870)

13
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Understanding Sodium from Halite — The Reactive Metal That Powers Life and Industry

Understanding Sodium from Halite — The Reactive Metal That Powers Life and Industry

بواسطة PeterSE

Industry 2.0 — Electricity, Steel & Oil (1870)

16
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2
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Understanding Protactinium from Uranium Ore — The Elusive Parent of Actinium

Understanding Protactinium from Uranium Ore — The Elusive Parent of Actinium

بواسطة PeterSE

تعدين

18
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Understanding Actinium from Uranium Ore — The Element That Named the Actinides

Understanding Actinium from Uranium Ore — The Element That Named the Actinides

بواسطة PeterSE

كيمياء

11
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Understanding Radium from Uranium Ore — The Glowing Element That Changed Science and Medicine

Understanding Radium from Uranium Ore — The Glowing Element That Changed Science and Medicine

بواسطة PeterSE

تعدين

16
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5
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Understanding Francium from Radioactive Decay — The Most Unstable Natural Element

Understanding Francium from Radioactive Decay — The Most Unstable Natural Element

بواسطة PeterSE

تعدين

23
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Understanding Radon from Radioactive Decay — The Invisible Killer in Your Basement

Understanding Radon from Radioactive Decay — The Invisible Killer in Your Basement

بواسطة PeterSE

الجدول الدوري

15
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Understanding Astatine from Cyclotron Synthesis — The Rarest Naturally Occurring Element

Understanding Astatine from Cyclotron Synthesis — The Rarest Naturally Occurring Element

بواسطة PeterSE

تعدين

24
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Understanding Polonium from Uranium Ore — The Deadly Discovery That Launched Nuclear Science

Understanding Polonium from Uranium Ore — The Deadly Discovery That Launched Nuclear Science

بواسطة PeterSE

كيمياء

22
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4
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Understanding Promethium from Nuclear Fission — The Phantom Lanthanide

Understanding Promethium from Nuclear Fission — The Phantom Lanthanide

بواسطة PeterSE

كيمياء

21
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1
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Understanding Technetium from Nuclear Fission — The First Artificially Made Element

Understanding Technetium from Nuclear Fission — The First Artificially Made Element

بواسطة PeterSE

تعدين

11
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1
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Understanding Xenon from Air Separation — The Strangest Noble Gas

Understanding Xenon from Air Separation — The Strangest Noble Gas

بواسطة PeterSE

كيمياء

21
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3
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Understanding Krypton from Air Separation — The Hidden Gas That Once Defined the Meter

Understanding Krypton from Air Separation — The Hidden Gas That Once Defined the Meter

بواسطة PeterSE

الجدول الدوري

23
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Understanding Argon from Air Separation — The Invisible Shield Gas

Understanding Argon from Air Separation — The Invisible Shield Gas

بواسطة PeterSE

الجدول الدوري

19
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