Standard rubber tired tractors are used by New Zealand agricultural limestone producer instead of using locomotives running on rails; rubber tired tractor works best in quarries where face is over 20 ft, haul is over 250 yd, grade is about 1 in 20, installation is semipermanent, and daily output is 100 to 600 tons; advantages of rubber tired tractors.
Haulage by rail and rubber tires
Rock Products
Rock Products ; 53 , n 5
1950
Aufsatz (Zeitschrift)
Englisch
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