མཛེས་སྡུག་དང་བདེ་ཐང

རིག་གནས་དང་ལོ་རྒྱུས

ཟས་དང་བཏུང་རྫས

ཕྱིར་འཕྲུལ་རིག

དངོས་ཁམས་རིག

བིལུ་པིརིན་ཊི ༧༦༤ ཡོད • ཡན་ལག་དབྱེ་རིམ ༡༥

ཡན་ལག་དབྱེ་རིམ་ལྟ་བཤེར

བིལུ་པིརིན་ཊི (༧༦༤)

764 ནང་ལས་ 24 སྟོན་དོ།

དངོས་ཁམས་རིག

ཡན་ལག་དབྱེ་རིམ་ལྟ་བཤེར

དྲོད་ནུས་རིག

འོད་རིག

འབྲེལ་བ

རྡུལ་ཕྲན

དངོས་རྫས་རིག

རྡུལ

མདོངས་རིག

རྡུལ་ནུས

བཟོ་རྫས་གསར

འཕྲུལ་རིག

ཆུ་འཕྲུལ་རིག

གློག་ཁབ་རིག

དྭངས་ཤེལ་རིག

སྐར་དངོས་རིག

སྒྲ་རིག

བིལུ་པིརིན་ཊི (༧༦༤)

The Grain Auger: Archimedes' Screw Spun Fast in a Tube

The Forage Harvester: Chopping Green Crop to a Set Length

The Rotary Tiller: Blades That Cut the Soil in Slices

The Combine Harvester: Cut, Thresh, Separate and Clean in One Pass

The Disc Harrow: Dished Wheels Set at an Angle

Hydraulic Draft Control: The Plough That Rises When the Soil Gets Hard

The Balanced Vane Pump: Two Pumps Facing Each Other in One Ring

Hydraulic Power Steering: A Piston That Follows the Driver

The Gerotor: Two Rotors, One Tooth Apart

The Hydrostatic Transmission: A Gearbox Made of Oil

The Spool Valve: Steering Oil With a Sliding Rod

The Double-Acting Cylinder: Push With the Bore, Pull With the Ring

Calibrating a Sprayer: Litres per Hectare from a Stopwatch and a Jug

Centre-Pivot Irrigation: A Pipe That Walks Round the Well

The Spindle Cotton Picker: Wind the Lint Off the Boll

The Ferguson Hitch: A Virtual Pivot Ahead of the Axle

The Power Take-Off: Sending the Tractor's Engine Back Down a Shaft

The Crawler Track: Laying Down a Road to Carry the Machine

The Bucket Elevator: Lifting Grain by the Bucketful, and Where It Lands

The Watt-Hour Meter: Counting Energy by Counting Turns

Shunts and Multipliers: One Movement, Every Range

The Moving-Coil Meter: A Coil, a Spring and a Radial Field

The Incandescent Lamp: High Resistance, and a Vacuum

The Arc Lamp: Burning Carbons and Keeping the Gap