Joints should be installed on the pipe thread wrapped with the appropriate raw material to ensure the reliability of sealing.
接头安装时管螺纹上应缠绕适当的生料带，以确保其密封的可靠性。
Flat welding flange not only saves space, reduces weight, more importantly, to ensure that joints do not leak, has good sealing performance.
平焊法兰不仅节省了空间、减轻了重量，更重要的是确保接头部位不会发生泄漏，具有良好的密封性能。
Sealing the external joints of the aircraft structure to make sure that water does not go into the structure and to make the structure aerodynamic.
密封飞机结构的外部接缝以确保水分不进入结构并获得结构的气动性。
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