查询词典 coal

The experimental results indicate that the coal desorption rate in the area is high,the amount of desorbed gas may reach 60%-85% of the total amount of desorbed gas over 96 hours .

结果表明，该地区煤层气解吸速率很快，96 h后解吸气量都达到了总解吸气量的60%~85%，720 h后解吸过程基本结束；解吸气量大，平均在18 m3/t以上。

The desorbed methane carbon isotope of coal core samples collected from Jincheng area, South Qinshui basin was measured.

对取自沁水盆地南部晋城地区的煤芯样中的解吸气进行了甲烷碳同位素测定。

The nuclear magnetic resonance imaging has been used in this work to study the deuterated solvent swollen coal, the cross-linked polyacrylamide hydrogel due to γ-ray irradiation and polystyrene in its θsolvent.

用核磁共振成象方法研究了溶剂中的溶胀煤、γ辐射交联聚丙烯酰胺水凝胶和θ溶剂中的聚苯乙烯。

Coal is one of the dirtiest fuels around and a major source of the world's carbon dioxide emissions.

煤是所有&最肮脏&燃料中的一种，它是世界二氧化碳排放的主要来源。

And coal, the dirtiest of all energy sources, is still by far the cheapest.

煤，最不环保的能源燃料，目前仍旧是最便宜的燃料。

And coal, the dirtiest of all energy sources, is still by far the cheapest.

而污染最重的能源----煤，仍然是最廉价的。

Coal is the dirtiest energy on earth.

煤碳是世界上污染最严重的能源

And coal, the dirtiest of all energy sources, is still by far the cheapest.

而煤，所有能源中最脏的一种，同样也是一切能源中最便宜的。

STEEL, metals and coal shipments from St Petersburg will be disrupted as dockers begin strike over pay dispute.

因工资争议引发的罢工行动将使圣彼得堡港的钢铁、金属及煤炭运输中断。

The globle is on the brink of a big switch from gas to coal as the preferred fuel for power stations, according to projections from Alstom, Siemens and General Electric, the globle's Number 3 biggest power equipment dors.

全地球最大的三家发电设备制造商阿尔斯通、西门子和通用电气预计，煤炭将取代天然气，成了电厂的首选燃料，形成重大转变。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。