សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
អនាគតបៃតង
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក
បុរាណ
120 ប្លង់មាន
ប្លង់ (120)
Understanding Titanium Extraction from Ilmenite — The Impossible Metal to Smelt
by Peter
Ancient
0
0
0
0
2
0
Hazardous content
Isolating Platinum from Alluvial Deposits — The Unwanted Silver of the Conquistadors
by Peter
Mining
0
0
0
0
0
0
ការទាញយកម៉ូលីបដិនមពីម៉ូលីបដិននីត - សារធាតុរអិលដែលពង្រឹងដែក
by Peter
Periodic Table
0
0
0
0
0
0
Extracting Tungsten from Wolframite — The Heaviest Practical Metal
by Peter
Specialty Alloys
1
0
0
0
2
0
Hazardous content
Extracting Chromium from Chromite — The Element That Paints the Rainbow
by Peter
Chemistry
0
0
0
0
0
0
Hazardous content
Extracting Manganese from Pyrolusite — The Cave Painter's Black That Cleans Glass
by Peter
Specialty Alloys
0
0
0
0
2
0
Hazardous content
Extracting Nickel from Pentlandite — The Devil's Copper That Wouldn't Behave
by Peter
Periodic Table
0
0
0
0
0
0
Hazardous content
Extracting Cobalt from Cobaltite — The Goblin Metal That Colors Glass Blue
by Peter
Chemistry
0
0
0
0
1
0
Hazardous content
Extracting Arsenic from Arsenopyrite — The Poison King of the Elements
by Peter
Mining
2
0
0
0
0
0
Extracting Bismuth from Bismuthinite — The Rainbow Metal from Sulfide Ore
by Peter
Ancient
2
0
0
0
0
0
Extracting Antimony from Stibnite — The Ancient Cosmetic Turned Metal
by Peter
Ancient
2
0
0
0
0
0
Extracting Zinc from Sphalerite — Roasting and Reduction of the Invisible Metal
by Peter
Specialty Alloys
0
0
0
0
2
0
Extracting Silver by Cupellation — Separating Noble Metal from Lead Ore
by Peter
Mining
0
0
0
0
1
0
Panning Gold from Alluvial Deposits — Gravity Separation of the Noble Metal
by Peter
Mineralogy
0
0
0
0
0
0
Hazardous content
ការស្រង់ទាញលោហធាតុបាទុង ពីសីណាបារ — ការចម្រាញ់លោហធាតុបាទុងពីរ៉ែក្រហម
by Peter
Ancient
35
0
0
0
1
0
龙井绿茶手工炒制 — 西湖传统杀青与辉锅工艺
by MeiLian
Agriculture
9
0
0
0
0
0
Gül Yağı (Rose Otto) Damıtma — Isparta'da Rosa damascena
by HanimGul
Ancient
5
0
0
0
0
0
Pagkuha ng Capiz Shell — Mula Dagat Hanggang Palamuti
by KuyaKlavo
Botany
13
0
0
0
0
0
ការទាញប្រេង neem ពីគ្រាប់ព种— វិធីសាស្រ្តសម្ពាធត្រជាក់បង្ហាប់របស់ប្រទេស Andhra Pradesh
by AnnaGaru
Ancient
0
0
0
0
0
0
Seringueira e Borracha Natural — Extração Tradicional de Látex na Amazônia
by MestreParafuso
Botany
2
0
0
0
0
0