环蚀

Valve plate and valve seat sealing surface for the oblique cone structure, oblique cone surface in the valve plate welding temperature, corrosion resistant Water Control valves alloy materials; fixed in the regulation of the spring between the ring plate and the plate with the adjusting screw assembly structure.

阀板与阀座的密封面为斜圆锥结构，在阀板斜圆锥表面堆焊耐温、耐蚀合金材料；固定在调节环压板之间的弹簧与低温阀门压板上调节螺栓装配一起的结构。

The inhibitory performance of triphenyl phospite in naphenic acid to the corrosion of A3 steel was investigated by the mass loss method.

采用静态挂片和SEM方法，考察了亚磷酸三苯酯在环烷酸腐蚀体系中对A3钢的缓蚀性能。

Provided are a variety of monomers suitable of producing photosensitive polymers, that are in turn, useful in photoresist compositions, through radical polymerization including at least one multi-ring alkenyl ethers and one alpha-fluorinated acrylate.

本发明提供多种单体，所述单体适用于通过包括至少一种多环烯基醚和一种α-氟化丙烯酸酯的自由基聚合制造光敏聚合物，所述光敏聚合物又可用于光致抗蚀剂组合物中。

Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively;(2)the pressure is distributed more equality, the transition area is larger.

论文的主要内容包括：(1)简述了阀门研究的现状与发展，在分析与总结国内外流体流动模拟研究的基础上，探讨开展阀门内水流运动数值模拟的意义；(2)对特定型号的射流泵进行了内部流场的数值模拟研究，并与实验数据相比较，验证了应用Fluent进行数值模拟的可行性和可靠性；(3)针对调流阀的特点，对特大口径环喷式流量调节阀进行流场计算，其设计指导思想如下： 1、控制旋涡，减小旋涡区，减小涡的强度； 2、控制压力分布，使阀体受力更均匀，改善局部应力状态，提高阀门使用的安全性； 3、最小绝对压力高于水的汽化压力，不产生汽蚀。

Effective measures are recommended to control the naphthenic acid corrosion of the pipe,including selection of corrosion-resistant 316 or 316L steels and modification of tee construction.

并提出了减缓阻垢剂进料管环烷酸腐蚀的措施，主要包括选用更耐蚀的316或316L材质以及改进三通结构等。

Aiming at the quality of copper(HSn-70A),the corrosion inhibition capacity of single PESA is studied. Its composite prescription is developed. The optimum composite scheme is selected as 10 mg/L PESA+ 0.5 mg/L BTA+2 mg/L Zn2++ 10 mg/L sodium gluconate. The corrosion rate of copper is only 0.000 5 mm/a under this condition.

针对凝汽器铜材质(HSn-70A)研究了单一聚环氧琥珀酸的缓蚀性能，开发了与之复配的复合配方，筛选出的最佳复配方案为10 mg/L PESA＋0.5 mg/L BTA＋2 mg/L Zn2+＋10 mg/L葡萄糖酸钠，在此条件下铜的腐蚀率仅为0.000 5 mm/a。

The gauges and tach are killer and check out the photo etched race wheel center.

规和 tach 是凶手并且检查被蚀刻座圈环轮心体的光。

Firstly the mid-pruduct imidazoline was produced by reaction of naphthenic acid and diethylene triamine, then the corrosion inhibitor amphoteric imidazoline, which is soluble in water, was produced by reaction of imidazoline and sodium monochloroacetate in aqueous solution.

以高纯环烷酸与二乙烯三胺反应合成了中间体咪唑啉，再以去离子水为溶剂，用氯乙酸钠对该中间体进行两性化，制得了水溶性两性咪唑啉缓蚀剂。

The filtering core is round column and welded with top and bottom covers bye anti-corrosive steel bar in wedgy section.The distance between every steel bar will be same and according to the filtering requirement.Several hoops are welded outside.So this filtering core has enough anti-deformed strength as well as high accuracy for filtering.

每个过滤元件呈圆筒状，采用楔形截面的耐蚀钢丝条与上下封焊接，每根丝条的间隔按过滤精度的要求等间隙均匀布置，在长度方向还焊有多道环箍，该滤芯不仅具有足够的搞变形的刚度和强度，而且可以严格保证过滤精度。

At different flow velocity, corrosion rate is further increased by the entrained sand in the medium.

旨在探讨缓蚀剂在含砂的高流速腐蚀介质中的腐蚀抑制和室内评价方法的建立，极端腐蚀条件下改性环氧涂料的性能，以及柴油的微生物处理过程中细菌的协同作用机理，为管道系统的内腐蚀防护应用和石油烃处理提供理论依据和技术支持。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失