permanent control

England dominated Normandy for some 30 years until France gained permanent control in 1450.

英国统治诺曼底约30年,直到法国在1450年得到永久的统治权.

The Haihe River must be brought under permanent control!

一定要根治海河!

Through the example of permanent pin timbering parapet in the west district of Changsha Institute of Electric Power, the methods of jet pin timbering construction and the key points of quality control were introduced.

通过长沙电力学院西区永久性锚拉挡墙施工实例，介绍喷锚（土钉墙）的施工方法，质量控制关键点等施工技术。

Direct Thrust Control of Interior Permanent Magnet Linear Synchronous Motor Based on Voltage Estimation

基于电压预测的直线永磁同步电机直接推力控制

The mechanism causing collapse should be the change of hydrodynamic field in the hydrodynamic zone ⅲ of the thick-bedded limestone, and the effect for permanent control of collapse could be achieved only when the prevention and harnessing measures are taken on the basis of this aspect.

引起塌陷的机理应是巨厚灰岩Ⅲ水动力带喀斯特管流水水动力场的变化，从而研究预防和治理措施也必须从这一主要方面入手，才能达到治本的效果。

Thrust Control of Permanent Magnet Linear Synchronous Motor with Low Ripple and Constant Switching Frequency

低脉动恒开关频率直线永磁同步电机推力控制

Rarely can permanent control be achieved by a single application of spray.

使用一次药剂防治难于持久地控制害虫.

Direct thrust control for interior permanent magnet linear synchronous motor ( IPMLSM) with hysteresis causes notable thrust as well as flux and current pulses during steady-state operation or with uncertain switch frequency.

直线永磁同步电机直接推力滞环控制，导致开关频率不定及稳态运行时会有明显的推力和磁链脉动产生。

In view of slide characters and actual project, the author put forward the comprehensive measures to put the situation under permanent control, such as slide-resistant pile, drainage, monitoring of landslide.

针对滑坡特征，结合工程实际，主要采用了抗滑桩、水、测等综合措施进行根治。

From the energy consumption, made the comparison test between asynchronous motor and permanent magnet synchronous motor hydraulic power systems, throttle governing and frequency control hydraulic power systems.

运用本实验系统，对节流调速/变频调速液压系统、异步电机/永磁同步电机液压动力系统进行了能耗对比分析。

The basic way of bring the Yellow River cutoff under permanent control

根治黄河断流的基本途径