To install a plurality of apparatuses on a flange of a tank.
This joint 80 has a main cylinder part 100 having a first installation part 84, and a sub-cylinder part 110 having a second installation part 86. The main cylinder part 100 and the sub-cylinder part 110 are formed in a state of integrally connecting the mutual outer peripheries. A first screw hole 85 in which a level gauge 90 is screwed is arranged in an upper part of the first installation part 84. A second screw hole 87 having a hole diameter D2 smaller than a hole diameter D1 of the first screw hole 85 is arranged in an upper part of the second installation part 86 (D1D2). The first installation part 84 is formed higher than the second installation part 86, and the height H1 of the first installation part 84 and the height H2 of the second installation part 86 are formed in the relationship of H1H2.
HONDA HIKARI
CHIGIRA ATSUSHI
