| 摘要 |
PROBLEM TO BE SOLVED: To make a diameter and a length of a rotor 20 small and enhance a function in a rotary joint. SOLUTION: The rotary joint has first passage holes (12A, 12B) communicated with respective second seal chambers (B, C) adjacent to a first seal chamber (A) in a body (10); and a second passage hole (4) communicated with the first passage holes (12A, 12B) at a passage part (3) provided on the outside of the body (10).
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