Carried out generalized Mises yield criterion , yield curve on the n flat face was circle curve, and different elected parameters correspond to external angular point circumcircle自拍偷拍av网址、 internal angular point circumcircle and incircle of Mohr-Coulomb unequiangular hexagon. According to unequiangular hexagon, circle yield curve which had the same area as hexagon can be found, and corresponding yield criterionwas equilateral circle yield curve.

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It showed the correctness of the criteria of roundness error and relationship between the minimum zone circle, minimum circumscribed circle and maximum inscribed circle and the effectiveness of the methods for evaluation of roundness error.

也驗證了圓度誤差判別準則及最小區(qū)域圓、最小外接圓和最大內(nèi)接圓特征點間的相互關(guān)系的準確性和誤差評定方法的有效性国产精品免费一区二区久久。

The criteria of the minimum zone circle method, minimum circumscribed circle method and maximum inscribed circle method were researched and the criterion of obtuse triangle was proposed.

研究了圓度誤差評定中最小區(qū)域圓法88888888视频欧美、最小外接圓法和最大內(nèi)接圓法的判別準則，提出了具有最小誤差的外接圓和內(nèi)接圓的鈍角三角形準則国产精品99久久精品2020，使圓度誤差的判別準則得到完善黄色视频免费二级毛片。

According to the characters of debris flow and risk controlling condition in mountain towns, The concentric circle theory of geography is introduced in this paper, The concentric circle model for debris risk control in mountain towns is discussed and the effect of "concentric circle model" in hazard risk control is analyzed.

針對山區(qū)城鎮(zhèn)泥石流危害特征及風險控制現(xiàn)狀，引入地理學中的同心圓理論黄页在线观看网站，探討了山區(qū)城鎮(zhèn)泥石流風險控制的"同心圓模式"久久精品视频在现，分析了"同心圓模式"中各風險控制層對災害風險的控制機制及效應，提出城鎮(zhèn)泥石流風險控制應遵循多層防范看看国产黄片视频在线、逐級降低的思路午夜男女免费观看视频，研究可為山區(qū)城鎮(zhèn)的減災管理提供合理的參考。

Stub Pitch is a number used to denote the radial distance from the pitch circle to the major circle of the external spline and from the pitch circle to the minor circleof the internal spline.

殘余徑節(jié)：殘余徑節(jié)是一個數(shù)免费观看黄色A片视频，它用于表示節(jié)圓與外花鍵的大圓或內(nèi)花鍵的小圓之間的半徑差亚洲成综合人在线播放。

Range is divided into basically forces opened fire on lap three, opened fire in the Green circle, basically for a median of mass destruction, the role of principal in order to reduce the morale of the enemy, yellow circle, I sides opened fire on the enemy's main regions, the role of the main anti-soldier , a red circle for the distance, often can lead to greater destruction, but more for the melee area.

基本上部隊開火范圍分為3個圈https黄视在线，在綠圈開火，基本上殺傷力為個位數(shù)JIZZ日本国产大陆内射极品，起到的作用主要為降低敵人士氣日韩亚洲欧美高清专区，黃圈為敵我雙方開火的主要區(qū)域，作用主要是殺傷士兵55夜色66夜色国产精品视频，紅圈為最近距離国产成年一级女人侧拍，通常可導致更大的殺傷力A毛片在线导航，但更多情況為melee區(qū)域女人18毛片一级毛片亚洲。

First of all, to the yellow circle voltigeur shooting the enemy, or green circle in the first row only shooting mission to induce the enemy close to the yellow circle and then after the two rows of continuous shooting, a close fight but the remnants of the enemy, immediately removed voltigeur , fusilier pull up hand-to-hand, at the same time do not forget to put first shot.

首先以voltigeur在黃圈內(nèi)向敵人射擊，或者在綠圈內(nèi)僅使用第一排射擊久草视频一区二区在线观看，誘使敵軍團接近妓女一级AA黄色视频，然后在黃圈內(nèi)連續(xù)射擊后兩排，一但殘余敵人接近肉搏欧美疯狂黄片，馬上撤下voltigeur国产www黄，拉fusilier上前肉搏，同時別忘了先放一槍精品女人视频一区。

The hour hand: the circle of a clock face is divided by 12 hours, so each hour is 1/12 of the circle, and since a circle is 360 degrees, each hour is 360/12 degrees, so the angle of the hour hand is calculated this way, but as you all have noticed, no analog clock's hour hand stands still exactly on the current hour number until an hour is passed.

時針：在時鐘面圓除以12小時精品亚洲一区二区三区中文字幕，所以每個小時的1 / 12圈，由于圓是360度女的高潮喷水视频，每一個小時是十二分之三百六度，所以時針的角度這種方式計算欧美日韩午夜性直播，但大家都已經(jīng)注意到在线观看黄A片免费网站啊别停，沒有模擬時鐘的時針上的立場仍有當前小時一個小時，直到完全通過www,射。

With China's reform, opening up and economic development, China has formed are many professional production on the regional situation, and raw materials distribution market, the focus on displaying products distribution market, the industry layout is very important in these regions all productive resources, technical resources , the market resources, and labor resources in a relatively concentrated form a well-some one hour economic circle, a half-hour economic circle in the economic circle many of the costs are lowest in the country, even the lowest in the world, if business investment with the regional advantages combined, the likelihood of success will be greatly enhanced.

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In this paper,the mechanism of circle existing in nature is discussed,the circle contribution to mathematics is analyzed,a design of limit circle model for sustainable development for economics and society is put forward.

探討了自然界圓形存在的機理国产乱子伦农村XXXX琪琪777，分析了圓對數(shù)學發(fā)展的貢獻十八禁视频在线，提出了建立經(jīng)濟與社會可持續(xù)發(fā)展極限環(huán)模型的設想。