锆

It shows that the time constant of RC circuit should be about 0.26 nano second to satisfy both conditions, the temperature of Exploding Bridge Wire is lower than the ignition temperature of the powder of Zr, which is 300℃, and the voltage of Exploding Bridge Wire is lower than the military standard of the safe electrostatic voltage .

本文以数值分析模拟在1秒的人体静电放放电时间作用下，推算电路所需连接的电阻与电容，模拟分析得到应连接放电时间常数τ等於0.26奈秒的电阻与电容，才可以同时满足金电桥温度低於点火药锆粉之点火温度300℃与军规安全静电电压100V以下。

Sapphire from Shandon and Hainan commonly have the reaction border, we found out this reaction border enriched with Fe,Mg,and K by testing its components; We also studied the inclusion in the sapphire, and found many KC1 crystal grain with variety of size, a melt inclusion enriched with K,Si, is also found, this may suggest an assimilationary-magmatic course; Besides that, another minerl inclusions such as enstenite, magnetite, chromite, zircon are also found.

观察到了山东、海南蓝宝石普遍存在的反应边，并测试了反应边的成分，证实其以富Fe，Mg，和K为特征；研究了蓝宝石里面的包体，发现蓝宝石里面存在着大小不等的KCl的结晶颗粒，还发现了富K富Si的熔浆包裹体，说明其形成过程中有同化混染的贡献；此外还发现了斜方辉石，磁铁矿，铬铁矿，锆石的包体矿物。

Valve housing and components used, such as the United States and build the Association ASTM standards, has monel, titanium, zirconium material, tantalum material Hastelloy, ultra-low carbon, alloy steel, stainless steel, carbon steel, etc..

阀门壳体及零部件采用美材协ASTM等标准，有蒙乃尔、钛合金、锆材、钽材哈氏合金、超低碳、合金钢、不锈钢、碳钢等。

By calculating the ratio of uranium to lead, they determined that a dozen of the grains were very old indeed.

通过计算进入的铀的含量，他们确定了十二个锆石颗粒的确非常古老。

By measuring the relative abundance of two types of uranium and lead in a zircon, geologists can determine old it is.

通过测量相对两种铀和铅的锆、据地质学家能确定旧。

Australia is the major producer of coal,alumina, bauxite, diamonds, titanium minerals and zircon and ranks second in the world in iron ore, mined lead and uranium.

澳大利亚主要煤碳，氧化铝，铝矾土，钻石，钛矿物质和锆石的生产者和位居第二在世界上在铁矿石内，开采引起和铀。

Applied to titanium, nickel, aluminum, magnesium, molybdenum, tantalum, niobium, silver, platinum, zirconium, uranium, beryllium, lead alloy material, stainless steel, copper, iron, platinum, gold, K gold, K platinum, silver and other precious metals high-quality welding.

适用于钛、镍、铝、镁、钼、钽、铌、银、铂、锆、铀、铍、铅等合金料，不锈钢、铜、铁、白金、黄金、K黄金、K白金、银等贵金属的高质量焊接。

Keywords tungsten trioxide;zirconia;solid acid;benzene;1-hexene;alkylation;potassium;strontium

氧化钨；氧化锆；固体酸；苯； 1-己烯；烷基化；钾；锶

Main Products: titanium, nickel, tungsten, molybdenum, zirconium, and its alloy plate, tube, rod, wire, foil and other materials.

主要产品：钛、镍、钨、钼、锆，及其合金板、管、棒、丝、箔材等。

Our main product include cubic zirconia, synthetic ruby, synthetic sapphire, synthetic spinel, glass diamond, glass, jewel bearings, etc. At the same time, we produce and process natural gems like peridot, garnet, white topaz, rock crystal, amethyst, citrine, coral, tourmaline, etc.

主要生产加工石榴石、白黄玉、紫晶、黄晶、茶晶、电气石、橄榄石、蓝宝石、红宝石、珊瑚等天然宝石；同时，还生产加工立方氧化锆、红刚玉、蓝刚玉、尖晶石、玻璃水钻、及稀土玻璃等人造宝石产品。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。