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第l期发刊词············。······························································……本刊编辑部(1〕龙陵地震的震源机制···························……
The first issue of the periodicals ... ... · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·········································································································· ..... ...