管

Elaborated the punching components formation principle the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machiningthe drawing and punching compound die with float punch-matrixthe drawing and cutting compound dies with unaltered pressthe compound die for the back bowl of the noise keeperthe design of the compound die which could produce two workpieces in one punchingthe bending die for the ring shape part the bending die which used the gemel automate loading die for cutting the drawingpunching and burring compound dies with sliding automated loadingthe punching die for the long pipe with two row of holethe drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

本文对冷冲压技术的分类、特点及发展方向作了简略概述；论述了冲压零件的形成原理、基本模具结构与运动过程及其设计原理；对典型的冲压件模具进行了设计：大直径三通管冲压复合模设计解决了大直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模设计、适力压边式落料拉伸切边复合模设计、消音器后补碗落料、拉深、冲孔、翻边复合模设计、一模两件落料拉伸冲孔翻边复合模设计、环形弯曲件的模具设计、铰链卷圆成形工艺及模具设计、半自动送料切角装置设计、滑板式送料拉深、冲孔、翻边模设计实现自动送料、长管多孔冲模设计、带凸缘台阶方盒形零件拉深模和盒形件侧壁小孔翻孔模。

In the low-pressure boiler pipe, hot dip galvanized pipe, precision tubes

中低压锅炉管，热镀锌焊管，精密管

Thai group to be a long day to provide greenhouse pipes, galvanized steel tube, hot dip galvanized steel pipe, square tube, high frequency welded pipe, spiral steel pipe and other types of pipe diameter, applied to Chinese laborers, machinery, construction, public business, shipbuilding, oil and other fields

天应泰集团长期以来向客户提供大棚管，镀锌带钢管，热镀锌钢管，方管，高频焊管，螺旋钢管等各种口径的各类钢管，应用于华工、机械、建筑、公用事业、造船、油田等国民经济的各个领域。

In the invention, the water outlet of a circulating pump is connected with the water inlet of a solar energy collector; a water check valve is arranged on a water circulating pipe between the water outlet of the circulating pump and the water inlet of the solar energy collector; the water outlet of the solar energy collector and the water outlet of a water supply pump are connected with the water inlet of a heating coil; the water inlet of the circulating pump and the water inlet of a drain pump are connected with the outer outlet of the heating coil; the water inlet of the water supply pump is connected with the water outlet of a water storage tank; and the water outlet of the drain pump is connected with the water inlet of the water storage tank.

本发明的循环水泵的出水口与太阳能集热器的入水口连接，水止回阀设置在循环水泵的出水口与太阳能集热器的入水口之间的水循环管路上，太阳能集热器的出水口和补水泵的出水口都与加热盘管的入水口连接，循环水泵的入水口和泄水泵的入水口都与加热盘管的出水口连接，补水泵的入水口与储水箱的出水口连接，泄水泵的出水口与储水箱的入水口连接。

The influence of different post weld heat treatment conditions on the microstructures and mechanical properties of friction welded joints between drill pipe DZ60 steel and its tie-in 40Cr steel has been discussed.

摘 要：首次采用摩擦焊接工艺对地质勘探用钻杆的管体与接头进行了焊接试验，探讨了不同的热处理工艺条件对DZ60钢钻杆管体与40Cr钢接头摩擦焊接头组织与性能的影响，并与采用热墩粗工艺生产的钻杆管体组织与性能进行了对比。

Under different structural parameters of exit tube,including the inner diameter and the structure shape,the separation efficiency and pressure drop of the guide vane cyclone tube were measured by comparative experiments and the flow field in the guide vane cyclone tube was measured by an intelligent five-hole pilot tube.

通过对比实验测定了不同排气结构下导叶式旋风管的分离效率及压降，同时用智能型五孔球探针测试仪测定了不同排气结构的旋风管内流场分布，结合性能实验与流场测量的结果，研究了排气芯管内径及其结构型式对分离性能的影响，为旋风管结构优化和开发及其分离机理的研究提供了一定的实验基础。

Carbon nanotubes are a group of new kinds of carbon allotropes with one-dimensional structure.

碳纳米管(Carbon Nanotubes，CNTs)是碳的一种新同素异形体，依其结构的差异又可分为多壁碳纳米管(Multi-walled Carbon Nanotubes，MWCNTs)和单壁碳纳米管(Single-walled Carbon Nanotubes，SWCNTs)。

The cell freezen amount is about 3×106 cell/ml, sample contents of each breed were between 40 and 50, cryopreservation ampules were 240-360 each breed.

每个品种的冻存样本含量为40-50之间，每个品种的冻存管数在240-300支之间，每个个体的冻存管数为6支，每支冻存管的细胞数量为3-5×106个/ml。

The production line for both three layer PE pipe and epoxy powder inner anticorrosion pipe came from the reformation of an original production line of three layer PE pipe. The main problems to have been solved are as follows, convert the conventional spray gun deflector into two parts of diversion nozzle and gun wick to suit for different pipe diameters; adopt two stage retrieval equipment to increase powder retrieval rate and improve work environment; enlarge the calibres of gas jet and Venturi pump jet to increase powder output 20% above to ensure the spry coating thickness; design gun pushing device to raise automatic production level.

三层PE管和环氧粉末内防腐管兼容生产线是在三层PE管生产线的基础上改造而成的，主要解决了如下技术问题：将常规使用的喷枪导流体改成导流嘴和枪芯两部分，以适应喷涂不同直径钢管的需要；采用双级回收装置，提高粉末回收率，改善作业环境；加大一次气喷嘴和文丘里泵喷嘴的口径，使出粉量增加20%以上，从而保证涂层喷涂的厚度；设计推枪装置，提高生产的自动化程度。

JA is a crucial signal molecule in inducing cambia to differentiate the secondary laticifer, and a local high level of JA in cooperating with other plant hormones, especially cytokinin, is prerequisite for the secondary laticifer differentiation.

研究表明，茉莉酸是诱导乳管分化的关键信号分子，局部高水平的茉莉酸是诱导维管形成层细胞分化次生乳管所必需的，同时需要其它激素的协同作用。

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。