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The vacuum circuit breakers were researched in 20th century 60 years and were put into production in 70 years.

我国于20世纪60年代开始研制真空断路器，70年代正式投入生产。

The leaching process was researched to produce manganese sulfate from pyrite and pyrolusite, When the reaction was proceeded under the conditions: temp.

本文试验研究了用软锰矿和硫铁矿湿法生产硫酸锰的生产工艺。当反应温度大于95℃。

The main results are as follows:(1) The mechanism model of spray pyrolysis was established and the experimental conditions was researched.

论文主要的研究工作如下：(1)喷雾热分解机理模型的建立和实验条件研究。

The micro-electro-mechanical system pyrotechnic technique is a high and new pyrotechnic technology that has been researched and developed abroad in recent years.

徽电子机械系统火工技术是国外近几年研究和发展起来的一种高新火工技术。

Through teaching the Pythagoras theorem and the make-square method of quadric equation with one unknown, the teaching practice of using mathematics history during mathematics teaching of the secondary school is researched deeply, so the educational value of mathematics history is embodied well.

第四、通过勾股定理的教学和一元二次方程的配方法的教学，更深入地进行了中学数学教学中利用数学史的教学实践研究，更好地体现了数学史的教育价值。

This paper makes studies of researched proposition on Pythagorean theorem an Projection theorem.

本文对勾股定理、射影定理的研究性论题进行了研究。

So this paper researched the water qua...

因此，本文较详细地研究了沱江水质保护规划。

In this thesis algorithms for quadratic programming problems are researched.

本文主要研究了二次规划问题的求解算法。

And the quantum quadratic residue codes. Isometries and equivalences of quantum codes also are researched.

详细研究了量子二次剩余码与经典二次剩余码的关系，并对量子二次剩余码做了好的扩展。

Referring to the physiological structure of horse, the structure and walking control method of a quadruped robot was researched.

参照马的生理结构，对四足马机器人的一种结构及其步行控制方法进行了研究。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。