variable magnification lens是什么意思

网络释义

用法例句

The design element and the experiment result of reversible orifices and changing orifices low velocity flow is high.

分析了可逆式孔板流量计和可变式孔板流量计的设计原理和实验结果。

This requires line pipe materials to have higher strength with properties suitable for the environment,such as high deformability or sour gas resistance.

天然气管线的敷设地域正在向遥远地区和环境状况严峻的地区扩展,这就要求管线钢管的材料必须具有高强度和适应环境要求的各种性能,如高可变形性和耐酸性气体腐蚀等。

The key technology points are analyzed,including variable load,double derrick system,riser storage and engine room.

介绍新一代深海半潜式钻井平台的总布置理念、思路,分析可变载荷、双井系统、隔水管存放形式、机舱数目与布置等关键技术点,并对平台总布置予以综合说明。

To start with the basic point beyond the traditional ideas, this article puts forward the variable factors that should be taken into account in designing industrial garment patterns and gives a further approach and study.

本文从超越传统设计观念的基点出发，提出了服装工业纸样设计中需要考虑的可变因素，并对此进行了深入的研究分析。

Emphasized the variable control to temperature and pressure, reach the goal of controlling convenient and high dependability.

本文采用可编程控制器(PLC)对全液压式注塑机的传统电路的控制系统进行改造,用PLC作为中央控制器代替了原有的专用控制器和复杂的电子线路,重点对速度和压力进行可变控制,达到控制方便、高可靠性的目标。

Variable control for valve timing is one of the important issue for development of automobile technology.

配气相位可变控制是现代汽车技术发展的重要课题之一。

The application of the maximum principle in the optimal control of fishery is discussed under the conditions of variable prices and variable costs.

进一步讨论了在可变价格和可变成本下最大值原理在渔业最优控制中的应用,推导出了鱼群的最优种群密度x*和最优收获率h*(t)。