你知道开孔管和密封孔管的区别吗？
Open orifice Vs. Sealed Orifice of the aluminum collapsible tubes: The orifice of the aluminum collapsible tubes are usually made open and sealed with membrane. It is well known that the aluminum empty tubes are used as the packaging of food, cosmetic cream, medicine ointment and chemical grease, such as mustard, chocolate, animal nutrition, hair color, hand cream, shaving gel, adhesive, glue, grease, shoe polish, paint etc. The aluminum collapsible tubes made out of pure aluminium has sound performance in airtightness. The [...]