When connecting flange, add sealing mat and lock connected bolt.
法兰连接时加密封垫后均匀锁紧联接螺栓。
The flange connecting piece connects a pipeline, having good sealing effect, simple installation process and long service life.
本实用新型连接管道，密封效果好，安装过程 简单，使用寿命长。
All accessory interfaces should have protection covers with good sealing, there is no damage on the connecting screws and flange sealing surface.
组件所有外露接口均设有防护堵、盖，且封闭良好，接口螺纹和法兰密封面无损伤；
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