... 翻笼 cradle dump 反常采煤区 abnormal place 反风 矿井内瓦斯爆炸后nbacklash ...
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geologic abnormal place 地质异常区
·2,447,543篇论文数据，部分数据来源于NoteExpress
Objective To evaluate the diagnostic value of ultrasonography and X-ray fluoroscopy in abnormal place of intrauterine contraceptive devices (IUD).
目的探讨超声、X线透视检查对判定节育环异常的价值。
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A pacemaker is a small device that doctors place in people with an abnormal heartbeat.
VOA: special.2010.06.02
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