From aspects of screening theory, field application effect and economics, this fine screen suit for the current production process of Shirengou iron ore.

从其筛分原理、现场使用效果及经济适用等方面来看，该细筛适合石人沟铁矿目前的生产工艺。

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15 exit the security screening process, having chosen from about 4-5 lines of roughly equal length (about ten people each);

早8：15完成安检。从四、五条长度相等的队伍中挑了一条（每队大约有十来个人）；

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15 exit the security screening process, having chosen from about 4-5 lines of roughly equal length (about ten people each);

早8：15完成安检。从四、五条长度相等的队伍中挑了一条（每队大约有十来个人）；

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