Step 4: Insert (C) into (B). Adjust the height you want then use L
type screw to tighten up.
Step 5: Repeat above steps for assembling another stand.
Step 6: Push the spring button and connect iron tube A 1 and A2.
Step 7: Insert Iron tube (A) into T shaped tube (C), and then use
L type screw to tighten up.
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