The present invention is directed to {HEAD ~ a gas turbine transition duct} having {TAIL ~ a collar} with at least one notched section, a seal apparatus for sealing a relief opening defined between opposing first and second transition ducts and a gas turbine transition duct apparatus comprising first and second transition ducts and a seal apparatus 
The present invention is directed to { HEAD ~ a gas turbine transition duct } having { TAIL ~ a collar } with at least one notched section , a seal apparatus for sealing a relief opening defined between opposing first and second transition ducts and a gas turbine transition duct apparatus comprising first and second transition ducts and a seal apparatus
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