DrägerSensor XXS - draeger.com- ผ้าอ้อมสำหรับทารกราคาค่าเอกสาร pdf pdf ,Brochure: Dräger's Guide to Portable Gas Detection (PDF) Matter with a temperature above its boiling point is said to be a gas. With respect to a human environment (normal conditions), any substance with a boiling point below 20°C at normal pressure is a gas.

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