6
Step 3：
Secure the seat cushion（9）to seat tube weld(11)with washer（17),nylon nut（10），lock well spring
knob （8）main frame weld. Adjust seat tube with spring knob(8) as arrow, Pull out the spring
knob to seat tube weld(11)with up/down，adjust it to suitable position as seat tube arrow，lock
well right spring knob（8）.
Step4：
Pull out plug(25) from seat tube weld ，adjust plug (25) to hole as below pic ，secure well to seat
weld (14)with bolt （13）washer（5）backrest （12）.lock well seat weld (14)to hole with bolt （15）
washer（16）nylon nut （10）.
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