Access to the Internet costs more, but compare these fees with just one paper programming manual, engineering reference guide, or college textbook; the cost is absorbed in fewer than four books.
连入互联网的费用会多一些，但是与纸质的程序设计手册、工程参考指南或者大学教科书相比，这些费用可被不到四本书抵消。
The results of calculation and test have important engineering reference value for the optimization design to the platens of injection molding machine.
计算和测试结果对注塑机模板的优化设计具有重要的工程参考价值。
This paper introduces the study status of safety and stability problems for power systems at home and abroad, and it is very useful for electrical engineering reference.
介绍了国内外电力系统安全稳定问题的研究现状，供电力工程参考。
The obtained ball bearings' equivalent stress and maximum contact pressure provide theoretical basis for bearings' design and failure form analysis and have engineering reference value.
求解得到的球轴承滚珠等效应力分布和最大接触压力分布为轴承设计和轴承失效形式分析提供了理论依据，具有工程参考价值。
The obtained ball bearings' equivalent stress and maximum contact pressure provide theoretical basis for bearings' design and failure form analysis and have engineering reference value.
求解得到的球轴承滚珠等效应力分布和最大接触压力分布为轴承设计和轴承失效形式分析提供了理论依据，具有工程参考价值。
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