Problems concerning the imported lining material, its skeleton, construction, and maintenance were discussed with a comparison with the domestic lining material.
并对衬里材料、骨架、施工、养护等有关问题加以讨论，与国内衬里进行了相应比较。
Problems concerning the imported lining material, its skeleton, construction, and maintenance were discussed with a comparison with the domestic lining material.
并对衬里材料、骨架、施工、养护等有关问题加以讨论，与国内衬里进行了相应比较。
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