种球

In order to make the alloy steel powder which conform to our need,the technique of high energy ball mill is studied.

高能球磨法是制备超细粉体的一种重要方法，但对不同的材料，制备粉体所需的工艺区别较大。

The Birmingham hip-resurfacing system, manufactured by the Orthopaedic Reconstruction Division of Smith %26amp; Nephew is a smooth chrome-cobalt ball-and-socket joint that preserves more of the patient s natural bone structures and stability, covering the joint s surfaces with an all-metal implant that more closely resembles a tooth cap than a hip implant.

Birmingham臀部重塑系统是由Smith %26amp； Nephew公司(Memphis， TN， USA)的整型外科重建分部制造的，是一种光滑的铬钴球型套筒关节连接装置，能够保留患者自然骨骼结构和稳定性，全金属移植物覆盖关节表面，更象一个牙齿帽状结构而不是一个臀部移植物。

Ball and plug is the same type of valve, only its closure is a sphere, the sphere rotates around the body axis to achieve open and close a valve.

球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。

The gauge has three kinds of indications red-white turnover ball or column and buoy can be selected.

该液位计指示形式有红白翻球或翻柱、浮标跟踪三种形式可选。

The gauge indicates clear, observes convenient. It has three kinds of indications red-white turnover ball or column and buoy can be selected.

该液位计指示清晰，观察方便，就地指示形式有红白翻球或翻柱、浮标跟踪三种形式可选。

Selected 7 - 10cm Qi mouth Schizothorax 50, to three kinds of Chinese herbal medicine ball method (clove, cinnamon, dried orange peel) alignment mouth Schizothorax attractant effect of experiment.

选用7--10cm齐口裂腹鱼50尾，以触球法进行三种中草药对齐口裂腹鱼诱食效果的试验。

The invention provides a method for preparing a tube-shaped cathode of a direct methanol fuel cell, belonging to the fuel cell field and comprising the steps of: dispensing a single solution for gel injection molding at first, then adding a mesophase bituminous coal micro ball into the single solution and stirring evenly to obtain stable slurry, then casting the slurry into a die, preserving heat until the single solution reacts with a cross-linker completely to obtain a carbon-biscuit, after drying and sintering the biscuit in vacuum, preparing a diffusion layer and a catalyst layer on the surface by dipping process, and then coating polyester electrolyte membrane with a burette, rolling the carbon on a warm table to solidify the electrolyte membrane.

一种制备直接醇燃料电池管状阴极的方法，属于燃料电池领域。本发明首先配制凝胶注模用单体溶液，之后将中间相沥青炭微球加入到单体溶液中，搅拌均匀得到稳定的浆料，然后将浆料浇注到模具中，保温至单体与交联剂完全反应，得到炭管素坯，将素坯烘干、真空烧结后，在其表面采用浸渍工艺制备扩散层、催化剂层，然后采用滴管涂覆聚合物电解质膜，在加热台上对炭管进行滚压，使电解质膜固化。

In order to solve the existing problems of drilling gravel and cobble stratum,common tungsten carbide-insert drill bits, composite diamond-tungsten carbide button bits and impregnated diamond-tungsten carbide bar bits were designed and tested successively.

针对卵砾石地层的钻进实践，先后设计与试验了三种类型的钻头；普通八角合金钻头、金刚石-硬质合金复合球齿钻头与孕镶金刚石-针状合金复合式钻头。

The composition, heat treatment process, structure and properties of a low-chromium cast iron ball which is suitable for large scale ball mill of copper ore processing were studied.

探索了适应于铜矿大型球磨机的低铬铸铁磨球成分、热处理工艺及组织性能，获得了一种贝氏体+马氏体组织的低铬铸铁及其强韧性处理的工艺。

General –For both the basic and CPVC housed stem extensions, the bottom rod coupling utilized for all ball valve extensions is fitted with turning-stops.

通用–对于基本的和CPVC封装的两种阀杆加长件，用于所有球阀加长件上的底部杆连接件都配置旋转止动装置。

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。