厨房：厨房门则应选择防水性、密封性好的门型，以便有效阻隔做饭时产生的油烟，如带喷沙图案、或半透光的半玻璃门。
The kitchen door: the kitchen should choose waterproof, sealing good door, in order to effectively block type of cooking fume sandblasting, such as design, or half light and glass.
大直径的液压缸，通常是收缩，迫使闸板的两半一起向中间运动去密封井眼。
Large-diameter hydraulic cylinders, normally retracted, force the two halves of the cover together in the middle to seal the wellbore.
这种密封实际上并不接触轴的表面，它的密封原理是将聚合物冷却到半熔融状态而形成自密封。
This fact does not contact the shaft seal surface, it is the sealing principle of polymer cooled to half molten state and forming the seal.
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