{HEAD ~ Two pairs} of {TAIL ~ like bracing members} hold the end supports of the support rollers, the bracing members of each pair having one end pivoted to a respective hydraulic cylinder for the pistons and the end supports of the other support roller being detachably fixed to the other bracing member ends 
{ HEAD ~ Two pairs } of { TAIL ~ like bracing members } hold the end supports of the support rollers , the bracing members of each pair having one end pivoted to a respective hydraulic cylinder for the pistons and the end supports of the other support roller being detachably fixed to the other bracing member ends
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