壳套

The mantle cavity is lateral and in most bivalves, the gills have a respiratory and digestive function.

双壳贝的外壳是由外套膜分泌而来，套膜包覆著内脏，在多数双壳贝中，外套腔多位於两侧，鳃具有呼吸和消化的功能。

We provide you with a variety of coupling: a patch-coupling, 2 drum gear coupling, three teeth coupling, 4-pin set of flexible couplings, 5-swelling connection kit, 6 Snake Spring couplings, coupling flanges 7, 8 radial button rigid couplings, coupling shell folder 9, 10-pin flexible couplings, 11-pin flexibility of the tooth - Axis, the Plum Blossom 12-coupling, 13 tire coupling, 14 Cross Coaxial universal joint, slider coupling 15, 16 roller chain coupling, and other non-standard coupling and inverse Only, Clutch, and other transmission equipment.

我们为您提供的联轴器品种有： 1 膜片联轴器、2 鼓形齿联轴器、3 齿式联轴器、4 弹性套柱销联轴器、5 胀紧联接套、 6 蛇形弹簧联轴器、7 凸缘联轴器、8 径向键刚性联轴器、9 夹壳联轴器、 10 弹性柱销联轴器、11 弹性柱销齿式联轴器、12 梅花型联轴器、13 轮胎式联轴器、 14 十字轴式万向联轴器、 15 滑块联轴器、16 滚子链联轴器等其它非标联轴器和逆止器、超越离合器等传动设备。

This paper deals mainly with the characteristics of the petrology, mineralogy, petrochemistry and geochemistry for the basic volcanics. The above result has indicated that these volcanic rocks are mainly a suite of eruptive pillow basic lava from the sea-floor, which have the characteristics of the continental and oceanic tholeiites and belong to the evolutionary products of the Liaohe rift from continental crust to oceanic crust.

重点討论了基性火山岩的岩石学、矿物学、岩石化学和地球化学特徵，结果表明，这些基性火山岩主要为一套海底喷发的基性枕状熔岩，具有大陆拉斑玄武岩和大洋拉斑玄武岩的双重特徵，是辽河裂穀由大陆壳向大洋壳演化过程中的產物。

As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.

由于在过渡过程分析计算中，需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数，所以本文就特性曲线及关闭规律问题进行了研究，其主要内容如下：第1章，指出本文研究的意义和目的，回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果，在此基础上提出本文的研究内容；第2章，针对收集到的六套特性曲线，从比转速的角度出发来研究可逆式机组特性曲线的变化规律；并对六套曲线的最高效率流量和力矩曲线进行分段拟合，得到各分段函数的具体形式，再通过举例说明最高效率曲线的拟合步骤；第3章，以溧阳抽水蓄能电站为实例，分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化；第4章，结合高、中、低三水头段抽水蓄能电站，在导叶直线关闭的基础上，研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响；第5章，总结全文，提出今后研究的重点和方向。

The rocks were probably situated in the followup obduction of split upper crust cover of the Yangtze Plate onto the North China Plate in or after the subduction of the Yangtze Plates continental materials towards the North China Plate,or were placed by southward thrusting when ultrahighpressure metamorphic rocks underpinned.

通过露头的构造地质分析，推断本套地层是在扬子板块陆壳物质向华北板块下深俯冲过程期间或其后扬子板块陆壳上部盖层继续向华北板块仰冲就位的，在超高压变质岩折返时经历了由北向南的逆冲。

Has: Blow-box tool kit sets; injection tool box sets, bubble shell tool sets, metal box tool kit tool kit.

有：吹塑盒工具套组套；注塑盒工具组套，泡壳工具组套，金属盒工具组套，工具包，。

Common transparent quartz tube SiO2 more than 99.9% purity, geometry, chemical stability, thermal stability, resistance to thermal denaturation and anti-crystallization properties of the fine, optical transmittance above 93%; from hydroxyl in hydroxyl tube below 10ppm, after vacuum from hydroxyl, hydroxy-up to 5ppm below apply to high-pressure mercury lamp, sodium lamp, metal halide lamp, such as low-hydroxy products; white pipe, used mainly for heating tube, heating tube, far infrared control the manufacture, milky quartz pearl quartz tube possession of new technology, the management side as if the surface of pearls, all aspects of performance than ordinary white tube better; filter tube to filter out ultraviolet UV band in the harmful wavelengths of 190-320nm ultraviolet light source applied to environmental protection manufacturing; no ozone UV filter tube and pipe the contrary, through the ultraviolet wavelength around 253.7nm, there is no ozone UV lamp main material, widely used in medical equipment, water treatment, food hygiene, such as sterilization; quartz casing diameter 8-120mm in between, has a single opening, double opening round, flat-top shape and widen the mouth of necking, flanging, sanding and other processing, high temperature resistance, corrosion resistance, good light transmission and moisture-proof, explosion-proof characteristics such as widely used in aquarium thermostat, disinfection equipment, heating pipes, water treatment, metal halide lamp, such as product manufacturing and environmental protection, health, chemical and other fields; quartz Clamshell specifications 8-180mm, the shape according to the customer requirements, the bubble shell can take capillary has to carry out the exhaust, high temperature, light transmission is good, mainly for JC, JD, H1-H7, the stage lights and high-pressure mercury lamp, sodium lamp, metal halide lamp, such as product manufacturing; quartz water jacket mainly used in printing and packaging processing industry ---- UV light-curing, UV light curing is a very reliable and can be used to replace hot air dryers and other drying technique of curing technology, which in the printing and packaging of the processing industry has been widely.

普通透明石英管SiO2纯度达99.9%以上，几何尺寸、化学稳定性、热稳定性、抗热变性和抗析晶性能优良，光学透过率达93%以上；脱羟管羟基在10ppm以下，经过真空脱羟，羟基可达5ppm以下，适用于高压汞灯、钠灯、金卤灯等低羟基产品；乳白管，主要用于发热管、加热管、远红外管的制造，珠光石英管乳白石英管之新工艺，管面好象珍珠的表面，各方面性能比普通乳白管更优；滤紫外线管能够滤除紫外光谱波段中对人体有害的190-320nm波长的紫外线，适用于环保光源的制造；无臭氧管与滤紫外线管相反，可透过253.7nm左右波长的紫外线，是无臭氧紫外线杀菌灯的主要材料，广泛用于医疗器械、水处理、食品卫生等杀菌；石英套管直径范围在8-120mm之间，有单开口、双开口、圆头、平头等外形和扩口、缩口、翻边、磨砂等加工，具有耐高温、耐腐蚀、透光性好及防潮、防爆等特点，广泛使用于水族恒温器、消毒设备、加热管、水处理、金卤灯等产品的制造和环保、卫生、化工等领域；石英泡壳规格Φ8-180mm，形状根据客户要求，泡壳上可以接有毛细管，可进行排气，耐高温，透光性好，主要用于JC、JD、H1-H7、舞台灯和高压汞灯、钠灯、金卤灯等产品的制造；石英水套主要用于印刷和包装加工工业---- UV光固化， UV光固化是一种十分可靠的、可取代热空气干燥机和其他干燥技术的固化技术，它在印刷和包装加工工业已经得到广泛应用。

Appearance, Founder R620 (VUR620-490) the default shell for the gray-black, but the other color version for you to choose, and this color version and the color is different from fixed-site market, the notebook, but can be as cell phones, for the superstructure onto the "red, yellow and black" colors, such as the "color coat", you can purchase this when coupled with the money, the color of all colors are income capsule daily notebooks and changed the color of heart, personalized fashion show!

外观上，方正 R620(VUR620-490)默认的外壳为灰黑色，但另有彩壳版本可供大家选择，而且这彩壳版并不同于市面上的彩色固定上盖笔记本，而是可以象手机一样，为上盖套上&红，黄，黑&等颜色的&彩壳外衣&，大家在购本时完全可以再加点钱，将所有颜色的彩壳都收入囊中，每天笔记本的颜色随心而变，尽显时尚个性！

First acts according to the igniter plug iron casing the product detail drawing, the production scale and the concrete working condition, had determined the design craft principle, formulates some feasible craft plans, and has carried on the analysis to each kind of plan, finally selected set of best reasonable crafts plans - to use the bean material: The multi- locations cold extrusion takes shape.

本文主要介绍了火花塞铁壳挤中径工序的冷挤压模具设计全过程，给出了具体的设计方法与步骤。首先根据火花塞铁壳的产品零件图，生产规模及具体生产条件，确定了设计的工艺原则，制定一些可行的工艺方案，并对各种方案进行了分析，最终选出了一套最佳合理的工艺方案——豆料：多工位冷挤压成形。

An auxiliary power motor with improved structure includes wheel shell, rotor ring, stator plate, central wheel axle and control circuit.

一种改良结构的辅助动力马达，包括轮壳、转子环、定子盘、中心轮轴及一控制电路，转子环的内环面埋设磁铁，定子盘周围固设环形矽钢片，其外环面具有多个T形齿牙，其齿数为非转子环磁铁数的公倍数，矽钢片设有三相星形线圈绕组，且于定子盘电机最佳启动角度处设有霍耳元件组；借此将定子盘固设于中心轮轴，令轮壳夹设住转子环并套设于中心轮轴两侧，当转子环旋转时，即可降低磁极间的钝齿转矩，令电动车行进更加顺畅无噪音。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。