查询词典 roof beam

"The mansard roof has two slope s on all four sides, a shallower upper part and a steeper lower part. See also hammer-beam roof."

复斜屋顶在四个面上都各有两个斜面，一个较浅的上部斜面和一个较陡的下部斜面。

"The mansard roof has two slopes on all four sides, a shal lower upper part and a steeper lower part. See also hammer-beam roof."

复斜屋顶在四个面上都各有两个斜面，一个较浅的上部斜面和一个较陡的下部斜面。

"The mansard roof has two slopes on all four sides, a shallower upper part and a steep er lower part. See also hammer-beam roof."

复斜屋顶在四个面上都各有两个斜面，一个较浅的上部斜面和一个较陡的下部斜面。

"The mansard roof has two slopes on all four sides, a shallower upper part and a steeper lower part. See also hammer-beam roof."

复斜屋顶在四个面上都各有两个斜面，一个较浅的上部斜面和一个较陡的下部斜面。

Based on the theory of"S-R"stability for the voussoir beam, the paper analyses the mechanics boundary condition, the distribution features of displacement and stress fields, the relationship between working resistance of supports and roof-to-floor convergence, roof stability in tip-to-face area in fully mechanized mining with sublevel caving etc.

论文视直接顶为可变形体，得到直接顶岩层破断角的大小和直接顶的强度及高度有关，传统的P一Δl双曲线关系并不适用于直接顶的高度成倍增加以后的情况。

It was point out that main roof can form the voussoir beam structures in the inclination, and immediate roof located at the middle\|lower section of a longwall face probably forms a voussoir arch structure with a small scale because of waste filling.

提出了大倾角条件下老顶岩层在运动中易于形成倾斜砌体结构板大结构，直接顶岩层则因上段冒落矸石充填，在采场中下段形成砌体梁小结构，并探讨了中下段小结构平衡的极限条件和结构失稳形式

A detailed calculation results verified the moment and deflection of lapped connection beam is similar as that of continuous beam. So the continuous beam analytic model is suitable for analyzing roof purlins. However, how to guarantee the stability of the bearing compressed zone without the tension bar in bottom flange greatly affect the use of continuous purlins in project, theoretical analysis is carried out.

对搭接模型和均匀连续梁模型的计算结果进行对比，证明采用均匀连续梁的分析模型可较为准确地描述连续搭接檩条的内力状况；而对于仅在檩条上翼缘附近设置拉条，竖向力作用下如何保证支座区受压下翼缘的稳定性在很大程度上影响着连续檩条在工程中的推广应用，因此对其进行了理论分析。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通过对岩层移动的现场观测，建立了&两硬&条件综放采场台阶悬臂—悬臂梁组合的煤岩组合结构力学模型，并以此煤岩结构为基础，建立&两硬&条件综放采场顶煤压裂的有限元数值模型，分析了坚硬顶板不同来压步距对坚硬顶煤的压裂效应，并确定了合理的支架阻力，从而对坚硬顶板进行有效的控制，消除坚硬项板对采场的冲击隐患，同时保证采场矿压对坚硬顶煤的有效压裂，达到提高顶煤回收率之目的，由此形成了坚硬顶煤、坚硬顶板条件下综放采场围岩控制的基本理论和方法。

Study English regard one happy and happy cushy job as, toughen one's scalp, head hang roof beam, awl sharp coolie.

把学英语当成一个开心而愉快的美差，而不是硬着头皮、头悬梁、锥刺骨的苦力。

Wuxi of history had plum , ruins Wu , roof beam small stream , deficient call that wait a moment for of money once.

历史上的无锡曾经有过梅里、吴墟、梁溪、金匮等等的称呼。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。