{HEAD ~ A boot} for covering the juncture between {TAIL ~ a drive shaft} and a universal joint casing formed of a resilient material and having a small end portion and a large end portion with a bellows structure therebetween 
{ HEAD ~ A boot } for covering the juncture between { TAIL ~ a drive shaft } and a universal joint casing formed of a resilient material and having a small end portion and a large end portion with a bellows structure therebetween
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