The first step is to remove the pin shaft and the card of the connecting piece between the two adjacent aluminum alloy trusses;<br>Step 2: remove the fasteners between the aluminum alloy truss and the Φ 48 steel pipe support in sequence, and it is strictly prohibited to remove all the fasteners at one time;<br>Step three: remove the aluminum alloy truss and place it well;<br>Step 4: remove the fixings between the Φ 48 steel pipe support and the adjacent structure.<br>Step 5: after all the aluminum alloy trusses are removed, remove the expansion bolts one by one, and remove the corresponding Φ 48 steel pipe supports and place them properly;
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