| 摘要 |
A water-chamber working apparatus (1) that performs a predetermined work inside a water chamber (131) of a steam generator includes at least two locking units (2) inserted into and locked to heat transfer tubes (132) provided on a tube plate (137) in the water chamber (131), a support means (3) spanned between the respective locking units (2), and a movable body (4) movably provided along the spanned support means (3). Accordingly, the movable body (4) can be stably supported in the water chamber (131) and can be easily moved.
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