| 摘要 |
PROBLEM TO BE SOLVED: To achieve a low cost with a reduced number of part items by directing a hose bayonet socket to a gas introduction pipe to a gas distributor in an arbitrary direction. SOLUTION: The present connection apparatus connects one end of a gas introduction pipe 4 to a gas distributor 3 such final it is rotatable around an axis of the gas introduction pipe 4. The other end of the gas introduction pipe 4 is protruded backward from a through-hole 9 drilled in a rear side surface plate 1a, and the protruded portion is bent laterally, and further a tip end of the protruded portion is formed at a hose bayonet socket 10.
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