Ensure the safety of pedestrians within or near the gap.
确保内或附近的差距行人的安全。
The research of the effect of base gap on the stress of explosives and the lunching safety
装药底隙对弹底应力及发射安全性影响研究
Current the Gap between the Rich and the Poor of Our Country and Ruling Safety of the Party
当前我国的贫富差距与党的执政安全
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