The riser's inner hollow core (a pipe within a pipe) is reserved for the drill string.
立管内部核心是空心的(管中管)，留给钻柱使用。
Hollow core was linked with hydraulic loose-core implement fixed on the moving die.
空心型芯与固定在动模上的液压抽芯器相连。
The size of the hollow core of vortex beam has close relationship with the topological charge.
涡旋光束的空心大小与光束的拓扑荷数有密切关系。
The structure is defined by a system of precast concrete porticos and hollow core slab roofing.
预制混凝土柱和空心屋面板构成了建筑的结构系统。
A coil compression spring is captured to the pin in the hollow core of a segment and urges the adjacent components together.
卷曲的压缩弹簧被固定在段的空芯内的销上，并促使相邻的部件互相靠近。
The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.
本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。
The first and second optical waveguides (46, 62) and the first output optical waveguide (64) are hollow core optical waveguides formed as channels in a substrate.
第一和第二光波导(46、62)以及第一输出光波导(64)是作为通道在衬底上形成的空芯光波导。
Simple and enormous intersecting walls give a balanced symmetry but are also the means by which the structure stands at the height of a 14-storey building, with an entirely hollow core.
简单而巨大的相交墙赋予了平衡的对称性，但也意味着结构具有14层高建筑物的高度，具有完全空心的核心。
The waveguide is preferably in the form of an optical fiber having a cladding that contains a photonic band gap structure which in turn envelopes a light conducting, hollow core portion.
所述波导采用的形式最好是具有包含光子带隙结构的包层而 该结构又包住传导光的空芯部分的光纤。
The opening force of die casting machine drives the crossed compound dog-led CAM mechanism draw core in inboard concave, and then make the hydraulic loose-core implement to draw the hollow core.
开模时，压铸机开模力驱动交叉复合弯销机构进行铸件内侧凹抽芯，然后液压抽芯器抽拔杯形型芯。
The paper illustrates the characteristics of hollow optical fiber in detail and uses the concept of evanescent wave to explain the beam transmission in interface of hollow and core.
对空心光纤的结构特点做了细致的分析，采用迅衰波场的概念来解释空心光纤纤芯与空心处的传光损耗。
If a hollow casting is to be made the pattern will include extension pieces so that Spaces to accept the sand core are molded into the sand. These additional Spaces in the mold are termed core prints.
如果铸造空心铸件时模型上包含伸长杆便于在砂中放置砂芯的空间称为型芯座。
Mount the coil in a vertical position, on a hollow wood base so that a core can be moved up and down through the hole in the spool.
芒在一个垂直的位置上一空心线圈木材基地，使核心可移动通过在阀芯孔向上和向下。
Ultraviolet reflectivity of metallic aluminum is the highest versus other metallic material, so metallic aluminum is the optimum material for fabrication hollow-core fiber.
相对于其他的金属材料而言，金属铝的紫外反射率最高，因此金属铝最适合用做制备空芯光纤的金属膜层材料。
The resin sand with high collapsibility is chosen to make the core of the near closed hollow ring on the basis of many technological experimentations through analysis of structure and process.
通过结构分析和工艺分析，在大量工艺试验的基础上，选用高溃散性树脂砂制作型芯，并成功地研制出大型薄壁复杂结构的封闭型腔铸件。
One of the most important geophysical techniques is core drilling, which is carried out with a hollow cylinder through subsurface layers to obtain samples of rocks.
岩心钻探是最重要的地球物理勘探技术之一。进行钻探时，用一根空心管穿过地表下层获取岩石样品。
Brushless DC motor from the stator core structure are divided into alveolar, a core non-alveolar, non-core non-alveolar and alveolar hollow stator Cup.
无刷直流电机从定子的结构来看分为有铁心有齿槽、有铁心无齿槽、无铁心无齿槽和无齿槽空心杯定子。
The screw consists of core spindle and several hollow screw segments which can be replaced easily for different materials.
该螺杆由芯轴和几个空心螺杆段组成，对于不同的物料，只需更换其中某些空心螺杆段即可。
During solidification of hollow ingot, its solidification and quality are seriously affected by the heat transfer boundary conditions between inner sleeve of core and cooling medium.
在空心钢锭凝固过程中，芯子内套筒与冷却介质之间的换热条件对空心钢锭的凝固过程及质量有着重要的影响。
After removing core layer, regular hollow structure of microfibers can be observed by scanning electron microscopy tests.
去除芯层后，通过扫描电镜测试，可观察到结构规整的中空超细纤维。
They're not wood at all but a hollow-core composite material with amazing structural strength and durability.
所有这些不是木头，而是有着惊人的结构强度和耐久性的一种空心核心合成材料。
The possibility of using a hollow-core Bragg fiber with cobweb- structured cladding to obtain low-loss transmission in wavelength range 0.
提出并分析了利用蜘蛛网结构包层空芯布喇格光纤在0。
So the paper presents the means of laser engraving of transmission by hollow-core optical fiber.
所以，本文提出用红外传能光纤进行传输激光能量的激光雕刻方法。
Generally speaking, there are two types of optical fibers for Mid-infrared laser transmission. One is solid-core optical fiber and the other is hollow waveguide.
目前研究传输红外激光光纤一般分为两类：红外实芯光纤和红外空芯波导。
Prestressed concrete hollow-core slab is a widely used structural element.
预应力圆孔板是被广泛采用的一种楼面构件。
The formation of the hollow spherical structure was interpreted in terms of the core-shell mechanism.
利用核-壳机理初步解释了空心球结构的形成过程。
Overseas, the hollow particle board doors have been as a high-quality core material taken into the market.
在国外，中空刨花板已作为一种优质门芯材料投入市场。
It is proposed especially for the hollow-core optical fibers, considering the defect of the present measurement techniques.
这是在考虑到国内外现有的光纤几何参数测量方法的缺陷，针对空芯光纤的特殊问题而提出的。
The hollow spindle covering machine is applicable to the coverings of bicomponent core yarns such as the covering of a bicomponent core yarn formed by a non-elastic core yarn and an elastic core yarn.
它适用于双组分芯丝包覆，例如一根非弹性芯丝和一根弹性芯丝组成的双组分芯丝包覆。
The hollow spindle covering machine is applicable to the coverings of bicomponent core yarns such as the covering of a bicomponent core yarn formed by a non-elastic core yarn and an elastic core yarn.
它适用于双组分芯丝包覆，例如一根非弹性芯丝和一根弹性芯丝组成的双组分芯丝包覆。
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