Fix the first blade on the pergola on the second position starting on the crank side of the B beam
(the left side).
Then remove the screw and the nut that is supposed to fix the crank system, insert the arm
where it's supposed to go, the blade in a vertical position, the arm must be folded and inserted
completely into the hole provided for this purpose, then fix it with the screw and nut removed
earlier.
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