1. Introducing the structure design, working principle and performance of double sealed guide valves. ������˫�ܷ�췧�Ľṹ��ơ�����ԭ���������ص㡣
2. Refrain from drinking tap water. Buy bottled water (from sealed bottles) or boil the water before drinking it. ������������ˮ�������ܷ�ģ�ƿװˮ��������ˮ֮ǰ��ˮ��С�
3. Behind the lion towers a huge mound or pyramid and under it is found a large, oval chamber which appears to be hermetically sealed. ��ʨ�ǵĺ����Ǿ�����ѻ���������ڽ������·�����һ���͡���Բ�η��䣬���俴���������ܷ�ġ�
ӢӢ����
adj.
1. established irrevocably
2. closed or secured with or as if with a seal
3. undisclosed for the time being
4. determined irrevocably
5. having been paved
6. covered with a waterproof coating
7. (of walls) covered with a coat of plaster