交换

Soon, a man in California offered MacDonald an electricity generator for the stove, which he traded to a man in New York for a neon beer sign and a keg.

不久，美国加州一名男子再以发电机和麦唐纳交换炉具，然后麦唐纳又拿这部发电机和纽约一名男子交换了一个啤酒霓虹招牌及一个啤酒桶。

1 The Internet: Key Technology Concepts The first book on packet switching was written by Leonard Kleinrock in 1964, and the technique was further developed by others in the defense research labs of both the United States and England.

第一本关于分组交换的著作是由Leonard Kleinrock于1964年所著，美国年所著，第一本关于分组交换的著作是由于年所著和英国防卫研究实验室的其他研究人员使这项技术得到进一步发展。

The switching table is stored using Content Addressable Memory. CAM is used in switch applications to perform the following functions

内容寻址性记忆体用来储存交换表格，CAM 是用来做交换应用去执行下列功能

A circle shear device for cutting holes in sheet metal as in claim 13 wherein said upper center shaft is vertically reciprocated between a first upward rest position and a second lowered operating position wherein: a said first upward position raises said first upper cutter wheel a sufficient distance to permit the unobstructed exchange of additional provided metal sheet through said cutting jaw; and b said vertical reciprocation means includes an pneumatic air cylinder.

削减的孔一个圆盘剪设备在金属板在要求13，说的上部中轴垂直被交换在第一个向上静止位置和第二个被降下的工作位置之间，： a首先说的向上位置培养说的第一个上部切削刀轮子一个充足的距离通过说的切开的下颌允许另外的提供的金属板通畅的交换；并且 b说的垂直的往复手段包括一个气动力学的空气圆筒。

Chemical raw materials: include a variety of plating materials and metal surface treatment agent: sodium such as tin, stannous chloride, pyrophosphate Asian tin, copper sulfate, nickel acetate, copper acetate, nickel fluoride, cobalt sulphate, acetic acid cobalt, hydrofluoric acid, anion exchange resin, cation exchange resin, scale inhibitors, cleaning agents, detergents,the phosphating agent, plate washer water, with the exception of Prince agents, rust removal agent, the American Iron and Steel room temperature blackening agent, on behalf of behalf of the black-white (open cylinder agents, supplements), and alloys such as gun color..

二。化工原料：包括各种电镀原料及金属表面处理剂：如锡酸钠、氯化亚锡、焦磷酸亚锡、硫酸铜、醋酸镍、醋酸铜、氟化镍、硫酸钴、醋酸钴、氢氟酸、阴离子交换树脂、阳离子交换树脂、阻垢剂、清灰剂、除垢剂、创辉的磷化剂、洗板水、除腊剂、除油除锈剂、美国的钢铁常温发黑剂、代白代黑、枪色黑合金等。

David Eisenbud, Commutative Algebra with a view toward Algebraic Geometry

高级的代数几何、交换代数的参考书，最新的交换代数全面参考

In this paper, we discuss effect algebra and related topics. The main results are the following:1. Effect algebra is a commutative algebraic structure. To get a non-commutative algebraic structure.we introduced the concepts of left difference and right difference, and we also introduced the concept of the Bi-difference sets, the concept of pseudo-difference poset, and proved that pseudo-difference poset is equivalent to pseudo-effect algebra.

效应代数描述的是具有交换性的量子系统，我们借助于差运算的思想研究了不可交换的量子逻辑结构，建立了左差、右差、伪差偏序集、双差集等概念，证明了伪差偏序集与伪效应代数等价，并得到了双差集的幺半群表示定理。

Chemical raw materials: The main raw materials include a variety of electroplating and metal surface treatment agent, such as acetic acid in the Czech Republic, nickel, copper acetate, nickel fluoride, cobalt sulfate, cobalt acetate, hydrofluoric acid, Yunnan tin sodium, Taiwan's Ya-tin pyrophosphate, oron the anion exchange resin, cation exchange resin, scale inhibitors, cleaning agents, detergents,the phosphating agent, plate washer water, with the exception of the Prince of water, oil derusting water, the United States steel at room temperature blackening agent, on behalf of behalf of the black-white (open cylinder agents, supplements), and alloys such as gun color.

六、化工原料：主要包括各种电镀原料及金属表面处理剂，如中捷的醋酸镍、醋酸铜、氟化镍、硫酸钴、醋酸钴、氢氟酸、云南的锡酸钠、台湾的焦磷酸亚锡、奥龙的阴离子交换树脂、阳离子交换树脂、阻垢剂、清灰剂、除垢剂、创辉的磷化剂、洗板水、除腊水、除油除锈水、美国的钢铁常温发黑剂、代白代黑、枪色黑合金等。

Wormhole switch and virtual cut-through switch.

虫洞交换和虚拟通路交换。

This paper investigates the catalysis of D-72 strong acid cation exchange resin on the synthesis of acetals,and systematically discusses the influence of reaction factors on the catalysis reaction.

研究了强酸性阳离子交换树脂对缩醛合成反应的催化作用，系统地探讨了各反应因素对反应的影响，研究发现，D-72强酸性阳离子交换树脂具有较高的催化活性，并能重复使用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。