pricipium是什么意思

用法例句

The Design of Speed Chain and Principle in Paper Machine;

造纸机速度链的设计与工作原理

The preliminary analysis of technology principle of laundry soap made by non-salting out mathod;

无盐析法制洗衣皂的技术原理初步解析

The Principle and Realization of Micro EDM Deposition Technology;

微细电火花沉积加工技术原理及实现分析

Theory and Desige of the Reverse Boring Cutter;

数控反锪加工刀具的原理和设计

Theory and Process of Ferrosilicon Liquid Globuling;

液态硅铁直接颗粒化的原理和方法

The working principles and applications of SRD;

开关磁阻电动机调速系统原理及应用

Principles and technical systems of non-dormancy culture on deciduous fruit tree;

落叶果树无休眠栽培的原理与技术体系

Principal of Remote Water Level Control and its Application;

远程水位控制的原理和应用

Research on problems coming out in application of virtual work principal;

虚功原理应用中的问题研究

In the paper,fundamental principal of speed control of centrifugal pump is illuminated, the cases about application of frequency control technology in petro-chemicl factories are introduced, the benefit after the application of frequency control technology and that before the application are contrasted, besides, the precautions during the application of transducer are pre.

变频调速技术由于调节方便、节能效果显著,在石化厂应用越来越广泛,本文论述了流程离心泵调速的基本原理,近年来变频调速技术在石化厂的应用,并对应用变频技术后产生的效益作了分析对比,同时根据实际情况提出了在变频器应用过程中应注意的一些问题。