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Conveyor belt of Mylar polyester
Uses of Mylar in candy factories
Uses of Mylar in candy factories
Polyester film conveyor belt at Goldenberg Candy Company
Blast furnace, Bethlehem Steel Corporation (Burns Harbor, Ind.)
Loading Mine Cars by Electricity
Refuse Conveyor at World's Largest Anthracite Breaker
Mechanical Car Loader
Appearance Test for Reading Anthracite
Modern Transportation in an Anthracite Mine
The Main Conveyors
Transport Competition at Anthracite Colliery
Loading Partly Cleaned Coal
The Lowering Conveyors
Electric Aids for Anthracite Mining
The Miner's Pick
Final Sizing Screens
Fuel from the Depths