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An arrangement for connecting at least one duct with an air-distribution casing, the at least one duct including two sidewalls opposite one another and including a peripheral wall connecting edges of the two sidewalls. The arrangement includes a connecting tube that extends through the casing, passe

An arrangement for connecting at least one duct with an air-distribution casing, the at least one duct including two sidewalls opposite one another and including a peripheral wall connecting edges of the two sidewalls. The arrangement includes a connecting tube that extends through the casing, passes through an orifice associated with each of the two sidewalls, and is connected to the at least one duct. A system controlling clearance of a turbo engine and a turbo engine can include air-injection ducts connected to the distribution casing by such an arrangement.

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1. An arrangement for connecting at least one duct with an air-distribution casing, the air-distribution casing including two sidewalls opposite one another and a peripheral wall connecting edges of the two sidewalls, the arrangement comprising: a connecting tube that extends through the casing and

1. An arrangement for connecting at least one duct with an air-distribution casing, the air-distribution casing including two sidewalls opposite one another and a peripheral wall connecting edges of the two sidewalls, the arrangement comprising: a connecting tube that extends through the casing and passes through an orifice associated with each of the two sidewalls, wherein an edge of each orifice is bent outwardly from the casing and forms a bushing to which the connecting tube is secured, and whereinan end of the connecting tube is connected to an associated end of the at least one duct. 2. An arrangement according to claim 1, wherein each end of the connecting tube extends outside of the air distribution casing. 3. An arrangement according to claim 1, wherein the connecting tube is open in an inside volume of the casing. 4. An arrangement according to claim 1, wherein the connecting tube is sealingly secured to each of the sidewalls. 5. An arrangement according to claim 4, wherein a connection between the connecting tube and each sidewall is carried out by soldering. 6. A device for controlling clearance of a turbine of a turbo engine comprising a plurality of air-injection cooling ducts that are connected to an air-distribution casing, wherein each air-injection duct is connected to the distribution casing by an arrangement as claimed in claim 1. 7. A device as claimed in claim 6, wherein two air-injection ducts are associated with a same connecting tube and each of the two ducts is connected to an associated end of the connecting tube. 8. An aircraft turbo engine comprising a device for controlling clearance according to claim 6. 9. An arrangement according to claim 1, wherein the connecting tube extends across an entire distance between the two sidewalls opposite one another. 10. An arrangement according to claim 1, wherein a duct that supplies air into the air-distribution casing opens in one of the sidewalls. 11. An arrangement according to claim 1, wherein a duct that supplies air into the air-distribution casing opens in the peripheral wall.