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Chwarae ar y gweinydd:
- Pennod 1 Battle Gear.
- Pennod 2 Proving Grounds
- Pennod 3 Commercial Jets
- Pennod 4 Apollo 13
- Pennod 5 Survival Technology
- Pennod 6 Chesapeake Bay Bridge and Tunnel
- Pennod 7 Garage Gadgets
- Pennod 8 Construction Machines
- Pennod 9 Hadrian's Wall
- Pennod 10 Monster Trucks.
- Pennod 11 Lighthouses
- Pennod 12 Computers
- Pennod 13 Engineering Disasters 3.
- Pennod 14 Chemical And Biological Weapons
- Pennod 15 International Airports II
- Pennod 16 Codes.
- Pennod 17 The M-16
- Pennod 18 The Colosseum
- Pennod 19 The World Trade Center
- Pennod 20 Hardware Stores
- Pennod 21 Saloons
- Pennod 22 More Gadgets
- Pennod 23 Cattle Ranches
- Pennod 24 Cannons.
- Pennod 25 Nuclear Subs
- Pennod 26 Air Shows
- Pennod 27 West Point
- Pennod 28 Quarries.
- Pennod 29 Diamond Mines
- Pennod 30 The House
- Pennod 31 Work Clothes
- Pennod 32 Bunkers.
- Pennod 33 Cemeteries.
- Pennod 34 War Games
- Pennod 35 Drive-Thru
- Pennod 36 Times Square
- Pennod 37 Los Angeles
- Pennod 38 Glass
- Pennod 39 Firing Ranges
- Pennod 40 The St. Louis Arch
27 Golygfeydd
Dynamite explodes hills to bits, drills divide sheer stone walls, 400,000-pound blocks are pulled from pits by giant cranes, and men work around the clock to wrest rock out of the earth. Not diamonds or gold…rock, the raw material of civilization! Without rock, modern society wouldn't exist. Roads, sewers, dams, bridges, buildings, paint, glue, make-up, antacids, and even chewing gum need crushed stone. From ancient days to the present, we explore the evolution of quarrying techniques.
Amser Cinio: 44:14 munudau
Ansawdd: HD
Dyddiad Awyr Cyntaf: Dec 10, 1993
Dyddiad Awyr Olaf: Aug 08, 2022
Pennod: 705 Pennod
Tymor: 23 Tymor
IMDb: 3.074
Delwedd