The finite element method is used to calculate and analyze the stress and the displacement of host rock when the openings is under the jet grouting support.
采用有限单元法对巷道注浆支护时的围岩应力和位移进行了计算分析。
The study has been carried out aiming at the unqualified silver corrosion of jet fuel in the oil truck and the result shows that it was caused by the element sulfur in oil truck.
针对喷气燃料装入罐车后银片腐蚀不合格的问题开展研究，结果表明主要为罐车含有元素硫所致。
Complete fluidic sprinkler is a new type sprinkler which was originated in China. The production achieves international lead in crack controlled and jet-flow element construction.
全射流喷头属于中国独创，在隙控式射流元件结构方面达到国际领先水平。
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