double seal meaning in English

双封层
双重密封
双重水封

The pot cover has applied double sealing
锅盖采用双道密封。
The submersible pump and motor have a double seal with a moisture detection system
配置潮气监测系统的潜水泵和电机具有双重密封装置。
Double seals : material code for the secondary seal is directly followed by the product seal face codes
注：双端面机械密封的型号表示方法为：在产品型号规格的后面书写两组材料代号，用横线相连。
Insert ball bearing unit is consisted of a double sealed , single row bearing and one of various types of housings ( cast iron or stamping steel housing )
带座外球面球轴承由一个双面密封且外圈具有球形外截面的宽内圈深沟球轴承和一个轴承座（铸铁座或钢板冲压座）两部分组成。
Use double seal rings ; install hair string and anti - water rubber , and use elastic seal string around the corner of doors and windows , and adopt all dry configurations to achieve excellent seal performance for air , humidity and sound
双道环形连续密封结构，滑动部分装有特殊设计的毛条及防水胶条，门窗四周采用弹性密封条镶嵌密封，全干法结构，使窗具有良好的气密、水密和隔音性能。