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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）.
6
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