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.
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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