查询词典 gas coal

Britain is the main mineral resources of coal, iron, oil and gas.

英国是主要的矿产资源，煤，铁，石油和天然气。

Therefore drainage of large quantity of high concentrated coal seam gas is of great significance.

煤层气是威胁贵州煤矿安全的重要因素之一，同时煤层气又是清洁能源，大量高浓度的抽放出煤层气具有十分重要的意义。

Two methods of distillation crystallization method and gas chromatography to determine the naphthalene content in coal tar oil were introduced.

介绍煤焦油中萘含量测定的两种方法：蒸馏结晶法和气相色谱法，对两种方法的优缺点及分析结果进行了对比。

The 600,000-ton annual capacity coke-oven and the complementary gas and coal tar processing installations of No.1 cokery of this company were set up in 1979 and have a history of more than 20 years.

公司第一焦化厂年产60万吨焦炉及配套的煤气、焦油加工装置始建于1979年，已有二十多年的历史。

Flow of pulverized coal belongs to gas solid flow regimes whose flow characteristic is complex and on line monitoring is difficult.

电厂煤粉输送属于气固两相流，其流动系统特性复杂，浓度的在线监测难度较大。

The basic characteristics of gas convective diffusion of underground coal gasification are studied.

研究了煤炭地下气化气体对流扩散的基本特征。

Using predecessor's experiences,also taking account of Coriolis force and three directional coal gas flow,the trajectory mathematical model of burden flow is built.

在总结前人料流轨迹计算模型的基础上，考虑了科氏力及三个方向煤气曳力对炉料运动的影响，建立了料流轨迹数学模型。

The main environment geological question is: The earth"s crust where the faultage and earthquake are active is unstable; collapse , landslide, mud-rock flow and soil erosion ; The underground karst subsides, seepage question; Basic rock expand, expend and compress soil body, the salt deposit corrode out of shape and groundwater"s corrodent harm; The soft soil question of basin; The soft rock body, cracked rock and the weathering rock are relatively poor stability; High and cold regional highways and railways" frozen soils freeze and melt calamity problem; The around rock of tunnel are unstable because of the coal seam gas, spring water, underground developed area; Project cutting slopes, constructed abandon soil and reservoir, lake"s ecology geological environmental protection issue; Thedangerous shoal of the channel % submerged reef question; The problem of rebuilding channel project and dock etc.; And the problem of unstable ground and groundwater corrosivity during building airport; At the same time, with the international big pathways" implementation and completions of constructions, adjusting the cities and counties" constructions , the crowd occupy changing , the cultivated land distribute changing and the adjustments of structure, will cause local environmental geological issues outstanding; According to multiple statistical analysis , value calculate and integrated appraise result, in the northwest and southwest of Yunnan, the traffic relatively low density, traffic engineering is relatively weak impact on environment, It is the area where a environme

主要的环境地质问题是：活动性断裂、地震带的地壳不稳定；崩塌、滑坡、泥石流及水土流失；地下岩溶塌陷、渗漏问题；基础岩体膨胀、胀缩土体、含盐层侵蚀变形和地下水的腐蚀危害；盆地软土问题；软弱岩体、碎裂、风化岩体稳定性较差；高寒地带公路、铁路建设的冻土冻融灾害问题；煤层瓦斯、涌水、地下采空区等隧道围岩不稳定问题；工程切坡、施工弃土及水库、湖泊生态地质环境保护问题；航道险滩、暗礁问题；渠化工程、码头等库岸再造问题；以及机场建设中的不稳定地基及地下水腐蚀性问题；同时，随着大通道建设的实施和完成，城镇建设的调整、人群居落的变化和耕地分布及结构的调整组合，都可能造成局部环境地质问题的突出等等。经多元统计分析数值计算、综合评价结果，滇西北、滇西南地区交通密度较低，交通工程对环境的影响程度较弱，是环境地质状况好的区域；有主要高原湖泊分布区的，包括昆明、个旧、文山的滇东南区域，环境地质状况较好；大姚、楚雄、篙明及会泽、昭通一镇雄的区域，即滇中北部中生界红层和滇东北岩溶区，环境地质状况中等；而包括保山、德宏、大理、临沧的滇西地区及景东一墨江以东、双柏一石屏一河口以西及东川一寻甸一曲靖地段的滇中一滇东地区，环境地质状况较差。云南国际大通道建设涉及全省区域，如何利用地质环境、实现可持续发展，就必须依赖于国际大通道建设与地质环境之间良性关系的建立。应本着对区域地质环境客观存在的科学认识原则、建设过程中环境效益优先的可持续发展原则、法制性原则、对大通道建设中环境地质的因地制宜及其可防治性原则。并且从组织管理、不同类型大通道、不同环境地质问题类型等方面，提出了对策措施。最后，提出了建立国际大通道建设与环境地质良性关系的宏观建议。

It is proved by experiments that the expansion energy of initial releasing gas and the thickness of soft coal seam can be used to forecast outburst accurately under the condition of "uncovering ideal crosscut".

实验证明，采用初始释放瓦斯膨胀能和软煤厚度可以准确地预测理想石门揭煤条件下的突出危险性。

An import and export tax Chapter 25 desalination, cement and all other non-metallic minerals, coal, natural gas, paraffin, asphalt, silicon, arsenic, stone material, non-ferrous metals and scrap and other metal ceramics; 25 kinds of pesticides and intermediates, some finished leather, lead-acid batteries, mercury oxide batteries, etc.; fine goat wool, charcoal, crosstie, cork products, some primary wood products such as the abolition of export tax rebate policy.

一个进口和出口税第25章海水淡化，水泥及其他非金属矿物，煤炭，天然气，石蜡，沥青，硅，砷，石材，有色金属及废料等金属陶瓷，25种农药及中间体，部分成品革，铅酸蓄电池，氧化汞电池等；细山羊毛，木炭，枕木，软木制品，部分木材初级制品如出口退税政策取消。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。