液化气钢瓶封口塞（瓶塞），是采用高级注塑复合材料制作的最新防伪产品。设计独特，具有易塞、易拉断、高防伪的特点。
易塞
头部设计有六齿，每个齿向向外并与塞子轴线成85°锐角，便于塞进。
易拉断
由于六齿的齿向向外并与塞子轴线成85°锐角，在拉塞子外盖时，六齿与与调压阀连接处的摩擦力突然加大，外盖环型塑料环被拉坏，而塑料内盖与六齿的连接仍然完好，以便于拉出六齿轮。
高防伪
由于瓶塞外盖环型塑料与内盖连接处被拉断，而且内塞塑料环也被拉伸展开， 防伪功能也就被破坏掉，无法复原.
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