Polyurethane adhesives has developed very quickly because of its excellent bonding power, prominent elastic behavior, wear resistance, low temperature resistance and so on. It has been widely applied to many industrial departments such as shoemaking, packaging, timbering, automobile, light industry and textile, mechanization and electricity, spaceflight and avigation and so on.

聚氨酯膠粘劑以其優(yōu)良的粘接性国产三级官网、突出的彈性欧美精品黄一区、耐磨性人人人人人人妇人人人干、耐低溫等特性使其得到了迅速的發(fā)展久久只有这里视频，已廣泛地用于制鞋sejjzzcom、包裝欧美爆乳激情A片、木材加工、汽車一级群交视频、輕紡午夜电影网址、機電、航天航空等工業(yè)部門中国产精选在线。

Forestry production are divided into three production stages as camp wood, timbering and,processing,combined with the exterior theories,the forestry exteriority is divided into the positive exteriority of camp wood production and negative exterior of timbering and processing

將林業(yè)外部性分為營林生產(chǎn)的正外部性和采伐在线观看av外国、加工生產(chǎn)的負外部性，并從法律經(jīng)濟學(xué)視角進行了解釋和論述亚洲一区二区三区激情在线高清。

Whether the timbering design of laneway is in reason or not will directly effect the excavating balance, safety of production and benefit of economy.

礦井巷道支護設(shè)計的合理與否国产欧美第一页，直接影響著煤礦的采掘平衡、生產(chǎn)安全和經(jīng)濟效益一区2区黄色网站。

And take into account of laneway collocation and timbering, the paper bring forward rational advice, which have some active significance to control deep laneway stability.

并針對此種情況下從巷道布置及支護的角度提出了合理的建議波多野结衣123操操超碰干，對深部沿空巷道穩(wěn)定性的控制具有一定的積極意義。

"Tudor style: Architectural style in England (1485-1558) that made lavish use of half-timbering, as well as oriels, gables, decorative brickwork, and rich plasterwork ."

都鐸風(fēng)格：英國建筑風(fēng)格黄色永久网站，大量應(yīng)用露木構(gòu)造以及凸肚窗高清狼友网、山頭、裝飾性的磚墻和富麗的石膏粉骚虎成人看片影院在线播放。

Secondly, it designs the whole bolt, and analyzes timbering effect.

其次成都毛片，對錨桿整體進行設(shè)計国产精品亚洲獵奇在线观看，并對支護效果進行了分析。

This papers main content is the Study of Fibre Rigid-Plastic Bolt and Timbering Parameter.

本文的主要研究內(nèi)容為纖維硬塑錨桿及其支護參數(shù)的研究黄页三级。

It is no doubt worth studying that how to make good use of bolt-net-tightwire compound timbering in soft roke roadway, in that this compound timbering is advanced and economical.

如何針對具體的圍巖狀況人妖色偷偷福利网站，選擇技術(shù)上合理、經(jīng)濟上可行的復(fù)合支護形式并對其支護參數(shù)進行研究欧美性爱一区二区三区精品视频，無疑具有很大的現(xiàn)實意義和研究價值国产一二区精品。

With the mine scale enhance and the mine toward deep level, the problem of the timbering and the maintenance of soft rock roadway is becoming more aculeated. It is the key of the mine toward deep leve and the safety mine Whether can we solve the problem of soft rock roadway timbering.

隨著礦井開采規(guī)模的加強和開采向縱深發(fā)展，軟巖巷道的支護與維護問題顯得越來越突出久久久性爱免费视频，能否解決好軟巖巷道的支護等問題在线观看A片噜噜操大全，是煤炭開采向縱深發(fā)展和安全生產(chǎn)的關(guān)鍵。

Then, depending on straits of the laneway timbering" s domanial knowledge, the author adopts the intellective structure of "database" plus "repository and positive and negative bi-directional reasoning mode. Moreover, running advanced Visual Basic 6. 0 high-class programme language, he develops and finishes the consultative expert system of laneway timbering design which has UI friendly and structure height blocking .

然后亚洲欧美精彩视频，根據(jù)巷道支護領(lǐng)域知識的特點久久国产高潮流白浆A片，采用&數(shù)據(jù)庫&+&知識庫&知識結(jié)構(gòu)和正、逆雙向向推理方式国产片一区二区在线视频，并運用先進的Visual Basic 6.0高級編程語言人人干人人操超碰chinese，研制完成了用戶界面友好、結(jié)構(gòu)高度模塊化的煤礦巷道支護設(shè)計咨詢專家系統(tǒng)二级片网站。