Validity and feasibility of the finite difference time domain method is demonstrated by the echo-wave signal of a flat bottom hole block.

Production Practice to Improve Machinability of Bottom Cylinder Block

改善发动机下气缸体加工性能的生产实践

With review of the deficiency in the reproduction and construction of small concrete hollow blocks, four types of block were presented including main block, accessorial block as well as bottom block.

针对当前混凝土小型空心砌块块型在生产和施工中存在的不足，本文介绍包括主、辅砌块及芯柱底块在内的4种块型设计。

Simulation and Optimization of Production Process of Double Bottom Block

双层底分段建造过程的方案选优

This paper establishes the fatigue stress spectrum of the transom and the bottom chord of a bridge over the Yellow River based on the measured stress and confirms the residual fatigue life by using mathematical model of existed steel bridge fatigue life.

以黄河某大桥的实测应力为基准，建立其横梁、下弦杆的疲劳应力谱，并运用既有钢桥疲劳寿命的数学模型确定其剩余疲劳寿命。

OSDTS not only has good wholeness, big stiffness, but also decreases the whole deformation of bridge and improves the mechanical behavior of deck with the bottom chord and tie beam heightened. 2.

该方案整体性好、刚度大，由于下弦杆和系梁加高，不仅桥梁的整体变形减小，而且也改善了桥面系的受力状态。

In which one of them was common reinforced concrete structure, and the other used prestressed steel reinforced concrete ( PSRC) in bottom chord of the transfer structure.

其中一榀模型为普通钢筋混凝土结构，另一榀模型在底部转换梁施加了预应力，并在底部转换梁及部分杆件采用了钢骨混凝土。

The double groove steel is suspended under the two nodes of bottom chord of steel roof truss to prevent the bottom chord from stretch bending.

文章论述了在设计中采用钢屋架下弦两节点下悬吊双槽钢作为分布梁避免钢屋架下弦拉弯工作。

The analysis reveals that the dynamic behavior of the converse trapezoid CHS truss with double pipe bottom chord is quite good.

分析表明以下弦双钢管为特征的倒梯形立体管桁架的动力特性非常理想；

The influence of crane load to the internal force of bottom chord bar of trapezoid steel roof truss

水动力荷载；吊车荷载对梯形钢屋架下弦杆内力的影响

Institute on The Hole Drill Technique of Bottom Chord Bar of Zhengzhou Yellow River Bridge

郑州黄河桥边桁下弦杆制孔工艺研究

The bottom chord of the truss is used by pre-stress steel bar.

主楼和裙房间采用大跨鱼腹桁架，桁架下弦采用高强度预应力钢棒。

The Construction Analysis of Prestressed Bottom Chord Shuttle Shape Spatial Truss

下弦管内预应力梭形空间桁架结构施工分析

This method can display the extremely fine effect, the jet black bottom color and the rich charm middle melody, is other techniques is unable to compare.

这种方法能够表现出极为精细的效果，漆黑的底色和富有魅力的中间调子，是其他技法所无法比拟的。

The top and bottom color entries are set to black ( 0,0,0).

顶部和底部的颜色项是设置为黑色。

The family was the cornerstone that constituted the Chinese tradition society," family standard" the culture constituted the traditional culture bottom color.

家族是构成中国传统社会的基石，“家本位”的文化构成了传统文化的底色。

The camel sign fragrant cigarette case bottom color is faint yellow, metaphor broad desert.

骆驼牌香烟盒的底色是淡黄色，暗喻广阔的沙漠。

The Manufacturing of the Bottom Cover

底遮板的加工

Bottom cover powder coated steel plate.

上下罩：钢板烤漆压筋。

The key of the problems is to design the seals and the speeding mechanism of the bottom cover of the reactor reasonably.

解决问题的关键在于密封和高分子聚丙烯酰胺反应器底盖快速开启机构的合理设计。

The Design Principle of Empty Jar Bottom Cover Counting Number Machine

空罐底盖计数机设计原理