The blow-blowing process typically includes multiple steps such as preform heating, stretch pre-blowing, blow-blowing, venting, and finished bottle removal. The filling machine uses gravity filling or pressure filling methods, employing filling valves and a control system to ensure consistent and accurate filling volume for each bottle. The capping machine achieves a tight seal by the fit between the capping head and the bottle cap, and the rotation of the capping head.
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