实际上，这种情况在上世纪70年代发生过。 当时普遍的恐慌性屯货将伊朗石油供应中断带来的效应给加剧放大了。
This actually happened in the late 1970s, when the effects of disrupted Iranian supply were amplified by widespread panic stockpiling.
简要叙述了南屯煤矿将旧铁路装车线改造为自动添加系统，介绍了该系统的原理、构成等。
This paper narrates how Hantun coal mine transforms the old railway load line into automatic loading system and introduces the principle and structure of this system.
分析了屯兰矿选煤厂原煤仓下电振给煤机吊挂系统损坏频繁的原因，将吊挂式改为支应安装方式，消除了环节影响。
Analyses reason that suspension system of electrical vibration convey coal machine is breaked under cleek coal store, changes suspension system into supporting system, that dispel effect of sector.
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