译文：
二十世纪九十年代以来，我国的包装印刷机械行业有了突飞猛进的发展，在品种、数量、技术、质量等方面都有了较大的提高。在制造技术上不仅提高了精度，而且还注重应用机电一体化技术和微机控制，加强了基础配套中的专用泵阀、电子元件和电机电控元件的配套，气动隔膜泵便是油墨循环装置中必不可少的配件。美、日、德、意的印刷机械上均配有这种气动抽墨装置。我国的纸箱和塑料印刷机械从九十年代中期开始配置气动隔膜泵，以取代在工作过程中易产生火花且易使油墨产生气泡的电动泵。 “长江”牌气动隔膜泵有着安全、节能、高效、耐用的特点，由于使用压缩空气为动力，工作过程中不会产生火花、静电或电磁干扰，适宜于易燃易爆场合使用。介质的流量可根据印刷机的需要，通过泵上的针型气阀进行无级调节。泵开始工作后，油墨不断往复循环，可防止油墨槽内的油墨产生结皮现象，以提高印刷质量。泵体和过滤器均采用合金铸造，泵内零件全部选用优质耐腐蚀材料制造，特种膜片和耐蚀输墨管可耐酯、酮、苯、醇等溶剂。 “长江”牌气动隔膜泵的工作原理：在压缩空气的动力作用下，泵内气腔辅助机构产生往复运动带动膜片鼓动，从而对泵腔内的介质（如油墨、胶水、溶剂等）进行压缩和抽拔，起到输送介质的目的。 “长江”牌气动隔膜泵的种类： （1）CJ601型气动单向隔膜泵：普通型。 （2）CJ601S型气动单向隔膜泵：带有手动回墨装置，换色或清洗时比较方便。 （3）CJ602型气动双向隔膜泵：双向供液，流量是单向隔膜泵的2倍，性能更加稳定，更适合与高速xx塑料印刷机械配套。

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原文：
Since the nineties the twentieth century, China's packaging and printing machinery industry has been rapid development in the variety, quantity, technology, quality and other aspects of the greatly improved. In manufacturing technology not only improves the precision, but also to focus on application of mechanical and electrical integration of technology and computer control, strengthening the foundation for supporting the special valve, electronic components and electrical components, supporting mechanical and electrical control, pneumatic diaphragm pump is the ink circulation device essential accessories. U.S., Japan, Germany, Italy, printing machinery equipped with such a pneumatic pumping ink devices. China's carton and plastic printing machinery from the mid-profile pneumatic diaphragm pumps to replace in the course of their work is easy to produce sparks and easy to make ink bubbles electric pump. "Yangtze River" brand pneumatic diaphragm pump has a safe, energy-saving, efficient and durable features, due to the use of compressed air as a driving force, the working process will not produce sparks, static electricity or electromagnetic interference, suitable for the use of flammable and explosive situations. Medium flow can press needs, through the pump valve on the needle-free level adjustment. Pump began to work, continue to cyclical nature of the ink to prevent ink tank ink resulting crust phenomenon, in order to improve print quality. Pump and filters are used alloy casting, pump parts full selection of high-quality corrosion-resistant materials, special diaphragm and corrosion resistant pipes Inking esters, ketones, benzene, alcohol and other solvents. "Yangtze River" brand pneumatic diaphragm pumps of the working principle of: The power of compressed air under the action of pump the gas chamber supporting institutions produce reciprocating motion driven diaphragm agitation, and thus pump cavity medium (such as ink, glue, solvents, etc.) compression and pumping drawing, playing the purpose of transmission medium. "Yangtze River" brand pneumatic diaphragm pumps of the type: (1) CJ601-type one-way pneumatic diaphragm pumps: ordinary type. (2) CJ601S type pneumatic diaphragm pumps one-way: with a manual back to ink device, change color or cleaning more convenient. (3) CJ602-type bi-directional pneumatic diaphragm pumps: two-way for the fluid, flow is one-way diaphragm pump 2 times, performance more stable, more suitable for high-grade plastics and high-speed printing machinery matching.

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