Texture of material:The body and a box cover for malleable iron; screws made of 304 staintess steel; the gasket material for rubber.
材质：穿线盒体和盒盖为热浸锌可锻铸铁；螺丝材质为不锈钢304； 垫圈材质为橡胶。
2
Because of the action of an outer cover and a sealing gasket in the inside, the change cycle can be extended largely by the water in the tray of the jar body, and the water is not easy to vaporise.
由于外盖及其内侧的密封垫的作用，罐体托盘中的水可大大延长更换周期，水不易蒸发。
3
This paper is based on the sealing reliability of flange for the DSHE and submits a predicting calculation' s method of the bolt for seating gasket used in circular-shaped cover of the DSHE.