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					Originally Posted by  cliff
					 
				 
				This is seen fairly clearly in the photo below which is from the Queensland Libary Collection and shows a Military parade through Brisbane. 
			
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 Crikey! I hope they turned off the Tramway Catenary for that parade. What sort of clearance is between the LC on the trailer and the wiring? 
Lionel, here's a pic of the trailer coupling turned upside down on top of another semi. These were permanently u-bolted to the chassis of the tow unit.