拧紧扰流板和附加翼子板。
将遮阳板放在车顶衬里上并用紧固螺钉拧紧。
Position sun visors on the roof lining and tighten with the fastening screws.
拧紧防止阀板转动的内六角螺栓，其作用是防止阀板转动拧断弹簧。
Tighten the inner hexagon bolt whose function is to prevent valve disc from rotating and breaking the springs.
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