cfr是什么意思

用法例句

The quality assurance of commercial plastic devices a duances has been the hot issue in the space industry.

由于技术进步的需要,航天器不可避免地遇到了选用不到高等级器件、而只能选用商用塑封器件的情况,商用塑封器件的质量保证方法是国内外宇航机构研究的热点问题。

The article stated a number of issues which should be solved by commercial low-temperature Air-source heat pump,such as heat pump cycle of screw compressor with economizer, Two-stage screw compression system,double stage coupling heat pump,cascade refrigeration system.

文章阐明了带经济器的螺杆压缩机系统、双级往复压缩系统、双系统中间水路耦合系统、复叠式系统等商用低温空气源热泵系统需要解决的一些问题,对于更好地促进这空气源热泵技术的发展具有积极的意义。

Design and Research of the Commercial Digital VRV Multi-connected Units with Sub-cooled Ice Storage System;

但是由于巨大的空间占地要求和施工要求冰蓄冷系统在中国工业上推广的并不理想,因此为了国家的能源调控政策及国家节能推广商用和家用的冰蓄冷系统研究会是值得研究推广的新领域。

In commercial carbon black(CCB), no sulphide, N or Zn is detected and most O .

结果发现,热解炭本体中“双键氧SO”峰随热解温度升高不断增大,硫化物含量高,Zn和大部分N分别以ZnS和胺的形态仅存在于热解炭本体中;商用炭黑中不含硫化物、N及Zn,O主要以“双键氧SO”形态存在;热解炭表面吸附层中S以“S-CR-S—S-R”形态存在,O的存在形态随热解温度的不同而改变,而450℃时热解不完全,表面吸附物很少;热解炭本体、表面吸附层及商用炭黑中均不含氧化物;热解炭粒径越小,O、S、N和Zn的存在形态越接近本体,表面吸附层的厚度大约为0。

The surface component of PCB was compared with that of commercial carbon black (CCB).

6,而商用炭黑中S约为0。

A numerical simulation commercial software has been developed by the object-oriented Visual Basic programming language on the basis of the 2D mathematical model of secondary cooling Process in billet continuous casting.

基于二维方坯连铸凝固传热数学模型,使用VB语言设计开发了方坯连铸计算机数值仿真商用软件,从而为连铸生产提供了一个有效的计算机"实验平台"。

The main commercial software in the field of tolerance design is compared and the research development of the software is summarized.

比较总结了当前主流的公差设计商用软件,展望了公差设计软件的发展方向。

Cell Behavior of Periodontal Ligament Cells Cultured on Commercially Pure Titanium;

牙周韧带细胞在商用纯钛表面生物学行为的实验研究

Optimization Design and Research of Driveline System Parameters for Commercial Vehicle;

商用汽车动力传动系参数的优化设计研究

This paper discusses the necessity of applying a retarder to a commercial vehicle,and the types and characteristics of retarders now used in vehicles.

探讨缓速器在商用汽车上应用的必要性以及目前使用的各种缓速器的分类及其特点。

Actualization of CAN-BUS on data acquisition of commercial vehicle;

CAN总线在商用车上数据采集的实现

Study on Positive Bob Impact Test of Commercial Vehicle Cab;

商用车驾驶室正面摆锤碰撞试验机研究

Study on the Ergonomic Design and Evaluation of Commercial Vehicle;

商用车人机工程设计与评价方法的研究