The evaluation provides scientific foundations for maintenance, rehabilitation and technical reconstruction of existing suspension bridges.
此类评估为既有悬索桥的养护 、 维修和技术改造提供了科学依据.
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Technical reconstruction of titanium metallurgy and developing direction of titanium industry were also given.
指出了试验中存在的问题,钛治炼技术改造及钛工业发展的趋向.
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