For the inverted V-shaped square tube of mc720-pk720 and mc721-pk721: first, change the square port of mc720 / 721 (flange for mc-720: 1220x2121) horizontally downward to the same size as the pk720 / 721 inlet (section D-D: 1300x1700), and then change it to the square tube connected by straight tube according to the attached figure. If the expansion joint is reserved, can it be changed in this way?<br>
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