以下为句子列表：
英文: 30is the project to produce 18ton/year synthetic ammonia and 30ton/year urea.The key equipment in the project are the copressor for the mixed gases of nitrogen and hydrogen and the compressor for carbon dioxide.Reciprocating compressor as well as centrifu
中文: 工程就是建成年生产能力达到18万吨合成氨、30万吨尿素的项目,项目中的关键设备为氮氢气压缩机及二氧化碳压缩机,压缩机选型正介于往复式压缩机和离心式压缩机之间,国内各设计院在八家立项的以煤为原料的中化肥厂‘18.30’工程初步设计中选何种类型的压缩机争论不休,本文从技术及经济的角度对此作了分析比较,并推荐采用往复式压缩机,以供参考。
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英文: 388 the new reciprocating (centrifugal, opposed-balanced) compressor will be installed next week.
中文: 下周将安装这台新的往复式（离心式、对置平衡式）压缩机。
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英文: Abstract: With a view of time-varying characteristic of the v ibration signal measured on reciprocating machinery and a brief introduction to the wavelet analysis and a nonlinear wavelet denoising theory, the paper makes an approach, by taking an triplex
中文: 文摘:针对往复机械振动信号的非平稳时变特点,本文在简述小波分析及非线性小波消噪理论的基础上,以重型机械使用的三缸泵为例,研究了用非线性小波消噪方法提取往复机械状态下的波形特性。
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英文: Apical shapes were formed through electropolishing in the 1-M NaOH water solution at 2 volts with reciprocating the electrode array.
中文: 尖端的形状通过电解抛光法构成，2伏的电压在电极阵列和1M氢氧化钠溶液之间互换。
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英文: Because the oil well pump belongs to a simplex reciprocating pump, the most authentic Adolph's differentical equation of movement of the reciprocating pump valve can be used to reserch the movement of oil well pump valve,but it is well known that this dif
中文: 由于抽油泵属于单缸单作用往复泵，因此可以将目前较权威的阿道尔夫往复泵泵阀运动微分方程用于研究抽油泵泵阀的运动规律，但阿道尔夫泵阀运动微分方程在泵阀开启初期存在奇点问题。
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