A leakage testing apparatus for testing whether or not a hollow member of a hollow shape has a leakage, comprising: a hold mechanism for holding the hollow member such that the inside and the outside are isolated gas-tight from each other; an injection mechanism for injecting a testing gas into the hollow...http://www.google.de/patents/US5861547?utm_source=gb-gplus-sharePatent US5861547 - Apparatus for and method of testing leakage of hollow member
