សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក
ការជីកយករ៉ែ
82 ប្លង់មាន
ប្លង់ (82)
Crude Oil from a Drilled Well: the American Cable-Tool Method (Crew 1887)
ដោយ Peter
ការជីកយករ៉ែ
4
0
0
0
0
0
Ingersoll Rock Drill
ដោយ Forge
ការផលិតកាត់បន្ថយ
52
0
0
0
0
0
Understanding Sodium from Halite — The Reactive Metal That Powers Life and Industry
ដោយ Peter
សម័យទំនើប
20
0
0
0
2
0
Understanding Protactinium from Uranium Ore — The Elusive Parent of Actinium
ដោយ Peter
សម័យទំនើប
25
0
0
0
0
0
Understanding Actinium from Uranium Ore — The Element That Named the Actinides
ដោយ Peter
ការជីកយករ៉ែ
24
0
0
0
0
0
Understanding Radium from Uranium Ore — The Glowing Element That Changed Science and Medicine
ដោយ Peter
សម័យទំនើប
42
0
0
0
0
0
Understanding Francium from Radioactive Decay — The Most Unstable Natural Element
ដោយ Peter
ការជីកយករ៉ែ
17
0
0
0
0
0
Understanding Radon from Radioactive Decay — The Invisible Killer in Your Basement
ដោយ Peter
សម័យទំនើប
23
0
0
0
0
0
Understanding Astatine from Cyclotron Synthesis — The Rarest Naturally Occurring Element
ដោយ Peter
ការជីកយករ៉ែ
20
0
0
0
0
0
Understanding Polonium from Uranium Ore — The Deadly Discovery That Launched Nuclear Science
ដោយ Peter
សម័យទំនើប
24
0
0
0
0
0
Understanding Promethium from Nuclear Fission — The Phantom Lanthanide
ដោយ Peter
សម័យទំនើប
17
0
0
0
0
0
Understanding Technetium from Nuclear Fission — The First Artificially Made Element
ដោយ Peter
សម័យទំនើប
26
0
0
0
0
0
Understanding Xenon from Air Separation — The Strangest Noble Gas
ដោយ Peter
សម័យទំនើប
18
0
0
0
1
0
Understanding Krypton from Air Separation — The Hidden Gas That Once Defined the Meter
ដោយ Peter
ការជីកយករ៉ែ
23
0
0
0
2
0
Understanding Argon from Air Separation — The Invisible Shield Gas
ដោយ Peter
ការជីកយករ៉ែ
15
0
0
0
2
0
Understanding Neon from Air Separation — The Gas That Lit the Modern City
ដោយ Peter
ការជីកយករ៉ែ
48
0
0
0
3
0
Understanding Helium from Natural Gas — The Element That Escapes Earth Forever
ដោយ Peter
ការជីកយករ៉ែ
21
0
0
0
4
0
គ្រោះថ្នាក់
Understanding Thorium from Monazite — The Nuclear Fuel That Could Replace Uranium
ដោយ Peter
នុយក្លេអែរ
16
0
0
0
4
0
Understanding Thallium from Pyrite Smelting — The Poisoner's Element
ដោយ Peter
សម័យទំនើប
12
0
0
0
1
0
Understanding Iridium from Platinum Group Ores — The Asteroid Impact Witness
ដោយ Peter
សម័យទំនើប
39
0
0
0
1
0
Understanding Osmium from Platinum Group Ores — The Densest Element on Earth
ដោយ Peter
សម័យទំនើប
23
0
0
0
2
0
Understanding Rhenium from Molybdenite — The Jet Engine Superalloy Element
ដោយ Peter
សម័យទំនើប
17
0
0
0
2
0
Understanding Hafnium from Zircon — The Nuclear Fuel Rod Guardian
ដោយ Peter
សម័យទំនើប
41
0
0
0
0
0
Understanding Lutetium from Xenotime — The Last and Densest Lanthanide
ដោយ Peter
សម័យទំនើប
20
0
0
0
0
0
បង្ហាញ 24 ក្នុងចំណោម 82