查询词典 concentric

Most of them have concentric space structure with single-center whose disadvantages have been more and more evident with accelerative development of urbanization.

我国大城市及特大城市的空间结构形态大都为单中心的同心圆结构，在城市化进程加速和城市规模不断扩大的情况下，这种结构的弊端已越来越明显。

Who knows what beautiful and winged life, whose egg has been buried for ages under many concentric layers of woodenness in the dead dry life of society,deposited at first in the alburnum of the green and living tree,which has been gradually converted into the semblance of its well-seasoned tomb —— heard perchance gnawing out now for years by the astonished family of man, as they sat round the festive board ——may unexpectedly come forth from amidst society's most trivial and handselled furniture, to enjoy its perfect summer life at last!

这卵已几世代地埋在好几层的、一圈圈围住的木头中间，放在枯燥的社会生活之中，起先在青青的有生命的白木质之间，后来这东西渐渐成了一个风干得很好的坟墓了，——也许它已经咬了几年之久，使那坐在这欢宴的餐桌前的一家子听到声音惊惶失措，——谁知道何等美丽的、有翅膀的生命突然从社会中最不值钱的、人家送的家具中，一下子跳了出来，终于享受了它完美的生命的夏天！

They are always characterized by concentric zoning texture, from the rim inward, consisting ofepidote, allanite and apatite; micro-inclusions of thorite are found within both apatite and allanite.

它们以同心环带结构为特征，从边部向中心依次为绿帘石、褐帘石和磷灰石；钍石既可包裹再磷灰石中，也可见于褐帘石中。

About 230 unique feature downfaulted basin in Mesozoic and kainozoc era distribute in the east continent and alongshore in China, which is the best concentric distribution area of continental facies oil-gas contain basin in the world.

陆相断陷盆地是世界上重要的含油气盆地类型之一，我国东部大陆及沿海分布着约230个各具特色的中、新生代陆相断陷盆地，是世界上最大的陆相含油气盆地集中分布区。

The shaft is mounted in the pump housing by axially spaced conical bearings, each bearing including a first element fixed on the shaft with a first conical bearing surface concentric with the axis, a coacting second element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface and a spring forcing the elements together.

所述轴由轴向地间隔开的锥形轴承安装在所述的泵外壳中，每一轴承包括：第一元件，固定在所述轴上，具有与所述轴线同心的第一锥形轴承表面；共同作用的第二元件，由泵外壳承载，具有与所述轴线同心的第二锥形轴承表面，该第二锥形轴承表面可滑动地啮合所述第一轴承表面；和弹簧，将所述元件压在一起。

Beijing Xuguang Tatsu Crystal Technology Development Limited belonging to the Beijing Municipal concentric diamond products power plant (hereinafter referred to concentric force), Xuguang reached an independently operated once in 2002 and production of raw materials CsI crystal processing.

北京旭光达晶体科技发展有限公司隶属于北京市同心力金刚石制品厂，旭光达成立于2002年曾经独立经营和生产碘化铯晶体的原料加工。

Flexors and extensors peak torque/body weight were measured at two angular velocities (30°/s、90°/s) in concentric and eccentric contractions modes in 30 patients with CLBP and 30 healthy subjects with Cybex-6000 isokinetic testing system, to evaluate flexor/extensor peak torque ratio during concentric and eccentric contraction and con...

运用Cybex－ 6000 型等速测力系统分别对30 例慢性下腰痛患者及30 例正常人在慢速（30°／s）和中速（90°／s）条件下进行腰屈伸肌的等速向心和离心肌力测试，评价屈肌与伸肌的峰力矩／体重比值，以及腰屈伸肌向心与离心的峰力矩／体重比值。

XD-2003 strap machine is changed from XD-2002 machine which has a cast aluminium on the bed,making the screw,screwtube and speed reducer keeping concentric.the V-model manger on the bed is lower than the flat on which the speed reducer is fixed,the components are finished machining by machine tool.guaranteeing perpendicularity, degree of balance.speed reducer,screw and screwtube is fixed on the base,and the screwtube is in the mini-manger,then ensuring axis keeping concentric with sheath,screwtube feed opening has a chromium hard-wearing sheath,which can improve the lifetime of the screw and screwtube to threefold or to fourfold.

XD-2003 型塑料打包带机组，是在XD-2002型机组的机座上安装了一个铸铁机座，使螺杆，螺筒和减速机保持同心，座上的V型槽比安装减速机的平面低，其部件都是经过机床精加工完成的，保证了垂直度和平衡度。减速机和螺杆、螺筒置于底座上，且螺筒卡在微型槽内。确保轴与套保持同心，螺筒下料口处设有高铬耐磨衬套，这样可使螺杆、螺筒的寿命提高3-4倍。

The concentric tapered pipe/reducing socket is advantageous to the fluid flow, in changes the diameter time is small to the fluid fluid state's disturbance, therefore the gas and vertical mobility's liquid pipeline use concentric tapered pipe changes a diameter.

同心异径管/大小头有利于流体流动，在变径的时候对流体流态的干扰较小，因此气体和垂直流动的液体管道使用同心异径管变径。

Based on the analysis of flexural displacement of the circular-shaped cover with a concentric ring or with a concentric ring and topsy-turvy cone, this paper describes the calculating method of displacement and stress in the cricular-shaped cover of DSHE, and the RPDP program for the strength and rigi...

本文通过对带圆环筋平板和有倒锥加强的加筋平板的弯曲变形分析，导出了DSHE大平盖变形和应力的理论计算方法，并在此基础上编制完成了用于DSHE大平盖强度和刚度设计的RPDP程序。第一次使按给定操作参数进行DSHE大平盖设计成为可能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。