| 摘要 |
PROBLEM TO BE SOLVED: To assemble a leak tester in at a narrow place. SOLUTION: The airtightness of a fuel tank (not shown in the figure) is checked by airtightly sealing both side faces of a joint main body 1 by screwing a first clamping member 10 having a knob 11 in a second clamping member 20 communicated with a leak tester and, at the same time, communicating the fuel tank with the leak tester through the through hole 14 of the first clamping member 10.
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