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Based on the characteristics of parameterized design and key technologies of knowledge based engineering, and specially according to the characteristics of the construction, figure, assembly-parameter of bicycle frame design, the article has achieved repeated using of experiential parameter and knowledge by adopting methods such as automatic reading experiential datasheet, computing parameter by making use of program, manual data-input or modifying and so on. Based on analyzing the characteristics of Rear End design and the associated characteristics with Chain Stay and Seat Stay, different design methods are analyzed in detail, and rapidly assembling of Rear End, Chain Stay and Seat Stay is achieved by using the method of combining top-down-assembly with down-top-assembly method. Based on analyzing special technologies and UDF characteristics, the repeated using of different sectional shapes by using UDF technology on the tube section design is also achieved, and this will greatly shorten the time spent on fixing the dimensions and orientations on sketches.

在探讨了参数化设计技术特点和知识工程关键技术的基础上，针对自行车车架设计中的结构、形状、装配参数特点，分别采用了读入经验数据表、参数程序求解、手工录入或修改方法实现车架设计经验参数和知识的重复利用；在分析自行车后叉片设计特点及与平、立叉的关联特性的基础上，对不同的设计方案进行了详细分析，并采用自顶向下和自底向上相结合的方法，实现了后叉片的快速装配定位与平、立叉设计相关联；在分析了特征技术和UDF特点的基础上，将UDF用于管件截面的设计上，使各种截面形状能不断重复利用，大大节省了约束草图尺寸和位置的时间。

The top coal fracture is described distinctly under the condition of different roof span and mining technology parameters. Through orthogonal experiment of numerical simulation, the rational pretreatment span of hard roof is determined, and the rational working resistance of support is selected also. As a result: the hard roof is effectively controlled not only to protect the working face but also to promote the caving of hard top coal to increase the recovery ratio.

在有效控制坚硬顶板的基础上，利用数值模拟正交试验法，研究了采高、采放比、支架阻力、放煤步距等工艺参数对顶煤压裂效果的影响规律，从而对工作面工艺参数进行优化；并根据实验所得放煤方式对块体顶煤的适应性规律，选择&两硬&综放面的放煤工艺，从而形成了系统、完善的&两硬&条件综放工艺。

Stronger and lighter than wood, it became a top seller, and Jimmy Connors became its most famous user, playing at the top of men's professional tennis for much of the 1970's using the long-throated, small-headed steel frame.

它比木头更结实，更轻便，成为了畅销货， Jimmy Connors成为了它最有名的使用者，他在20世纪70年代使用这种长拍喉，小拍头的金属框球拍，在职业网球里处于顶尖位置。

Here's a tip when installing door panel rods: Slip the top rod pocket of door panel through the top rod and secure it to brackets.

这里有一个一角安装门板棒：滑动杆顶端门口袋小组通过顶端杆和稳固以括号。

Put your books on top of the desk; only the top side of the box was painted.

他把国旗插在了珠穆朗玛峰的顶部。

Top or let a shoulder slip out from your top, the bare shoulder is a summer-perfect look.

不论是吊带装还是半边的露肩装，露肩总是夏天的一道亮丽的风景线。

Whether you bare it with a strappy top or let a shoulder slip out from your top, the bare shoulder is a summer-perfect look.

不论是吊带装还是半边的露肩装，露肩总是夏天的一道亮丽的风景线。

Bare Shoulders 露肩装 Whether you bare it with a strappy top or let a shoulder slip out from your top, the bare shoulder is a summer-perfect look.

不论是吊带装还是半边的露肩装，露肩总是夏天的一道亮丽的风景线。

Further more, an improved scheme was proposed according to the characteristics of fluid flow in Lost Foam Process. The simulation and pouring test results show that the shrinkage defect at the top of the sheathing board casting could be eliminated by using top gating system.

根据干砂消失模铸造充型过程特点，提出了改进方案，数值模拟结果及浇注实验结果表明，采用顶注式浇冒口系统可以消除铸件顶部的集中缩孔缺陷，证明了模拟软件的正确性。

A video-portrait and the self-shot footage out of this person's life are mounted one on top of the other and projected into a top corner of a small, dark room.

一幅&录象肖像画&以及其本人所拍摄的自身生活的景象，上下一体放置，同时投放在一个黑暗、狭小房间的墙角上方。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。