Soozier A91-229V00 Instructions D'assemblage page 8

Step 3：
The knob (11) is screwed into the hole and tightened to fix the front support and
the main frame.
Step 4：
Insert the front leg tube (2) into the front support tube;tighten with a nut to fix the
front leg tube (2) and the hook leg (5);the foam (4) is inserted into the hook tube
(5) round tube Inside
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