由于衬砌水电站压力隧洞费用极高，如果能取消、即使部分取消压力隧洞的钢板衬砌，将能得到极大的经济效益。
Considering the high cost for Iining pressure tunnel a considerabie economic advantage can be obtained if pressure tunnels keep unlined completely or only partly.
罐外壳由钢板与吊架焊接而成，内衬砌筑耐火砖。
Tank shell by welding together steel plates with the pylon, lined masonry firebrick.
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