In order to enhance the efficiency of excavating coal, Beishan coalmine attempts to adopt millisecond delay direct initiation at working face.
百善煤矿为提高采煤效率，尝试在采煤工作面实行毫秒延期反向起爆。
Primary disease always be clinical common disease and frequently encountered disease , not only direct influence people's health, but also initiation other complication.
本病为临床常见病和多发病，不仅直接影响人们的身体健康，并可引发其他疾病及很多并发症。
Primary disease always be clinical common disease and frequently encountered disease , not only direct influence people's health, but also initiation other complication.
本病为临床常见病和多发病，不仅直接影响人们的身体健康，并可引发其他疾病及很多并发症。
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