Do not overheat cylinders to increase pressure or discharge rate. NEVER insert an object (e.g., wrench, screwdriver, pry bar, etc.) into valve cap openings.

• 禁止使钢瓶过热来增加压力或流速。禁止把物体（如扳手、螺丝起子、撬杆等）插入阀门帽地开口处。