极坚固的

Dwyer has been for 75 years in the World, its Low 〔differential） pressure instruments are high appreciated and are applied broadly over the World. Alicat Scientific has over a decade of experience in providing Mass Flow Meter, Flow Controller , Pressure Gage and Pressure Controller products. InstruTech concentrates in researching and manufacturing the vacuum gauges. Wasco concentrates in producing pressure switch、vacuum switch and pressure transmitters. Pyropress has been for about 60 years in the control and procedure application in the world, its products are rugged, lasting, many of which have options of explosion-proof, they are widely used in the harsh fields such as nuclear and non nuclear power generation, petroleum, chemical industry, defense industries, and so on.

美国Dwyer公司已有75年的历史，其微〔差）压产品在全球享有极高盛誉并得到了广泛的应用；美国Alicat公司在流量测量和控制领域有着数十年的丰富经验，为您提供精确、可靠的质量流量解决方案；美国InstruTech公司专注于真空测量仪表的研发和制造；美国Wasco公司是专业的压力开关、真空开关、压力变送器制造商；美国Anderson公司专业制造用于医药、食品等领域的卫生型压力、流量等仪表；英国Pyropress公司在控制和过程应用方面有近60年的历史，其产品坚固、耐用，许多都有防爆选项，大量用于核电站、电厂、石油、化工和国防等要求严格的领域。

The stainless steel is one which forms depending on its surface is extremely thin and the firm close stable rich chromium oxide film, prevents the oxygen atom to continue permeating, to continue to oxidize, but obtains the anti-corrosion ability.

不锈钢是靠其表面形成的一层极薄而坚固细密的稳定的富铬氧化膜，防止氧原子的继续渗入、继续氧化，而获得抗锈蚀的能力。

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。