介绍了新研制的预抽真空式可控气氛气体渗碳炉。
A newly developed BBH pre - vacuum - pumping carburizing furnace has been introduced in this paper.
主要介绍了合理预抽期确定模型在焦作矿区的应用。
Application of confirmation model for reasonable pre-draining time is introduced in this paper.
本发明可以解决煤层、特别是低渗透煤层的煤层气的预抽采技术难题。
The method can solve the technical problem of pre-extracting the coal bed gas of a coal bed, in particular for a low-permeability coal bed.
其中预抽煤层瓦斯能和其他防突措施配合采用，因此其具有广泛的适用性。
Take the coal seam gas out among them in advance being able to compose in reply measure composition defending against other dashing forward adopt, the person has broad serviceability therefore.
目前，本煤层瓦斯预抽放措施仍然被认为是预防瓦斯灾害最有效的方法之一。
It is considered that the gas pre-extraction measure in coal bed is one of the most effective methods to prevent the gas disaster.
两个镀膜室通过预抽真空管道和蝶阀、高真空三通管道和闸板阀组成一个整体。
Two film plating Chambers are formed into a whole via a forvacuum pipeline, a butterfly valve, a high-vacuum three-way pipeline and a gate valve.
如：真空冶炼，电力电容器，变压器，真空浸渍处理，真空镀膜设备中的预抽等。
For example, vacuum metallurgy, power condensers, transtormers, vacuum macerate process, fore-sucking for vacuum coating equipment, etc.
现场试验表明，这是一种适于井下工作面钻进瓦斯预抽放短钻孔的轻便高效钻机。
The field test indicated that the developed drilling rig is appropriate for underground pre-drainage of coal seams.
残余瓦斯压力和预抽率的检验以及煤巷掘进期间的区域验证，均证明按该方法布置的预抽钻孔，消突效果有效。
The measurement method is demonstrated valid in outburst elimination by the examination of remnant gas pressure, pre-drainage rate and the zonal verification during the coal roadway driving.
利用瓦斯抽排孔把井下瓦斯预抽后排到地面，是我国目前煤矿预防瓦斯事故和进行综合利用能源的有效方法之一。
It is one of the effective methods for energy and resources comprehensive utilization to have gas drained to the ground by using gas-discharging hole in China.
消突效果检验后进行煤巷掘进，掘进期间通过对突出危险性指标和瓦斯涌出参数的分析，验证穿层钻孔区域预抽瓦斯消突技术的有效性；
The outburst risk index and gas gush feature are analysed during roadway progress. The result proves that the effectiveness of zonal gas pre-drainage by cross-measure boreholes.
文章详细阐述了催化裂化重整车间抽提系统、预加氢系统、催化重整部分换热设备管束腐蚀情况。
The corrosion of heat exchanger tubes in extraction system, pre-treatment system and reforming system are described in detail.
煤层深孔预裂爆破近年来在瓦斯抽放中运用日益增多，但目前对其爆破理论研究较少。
The technique of deep-hole presplitting blasting in coal bed is widely used for gas predrainage recently; but its blasting theory is not clear up to now.
压铸件内凹处两侧采用液压抽芯机构抽芯，为防止滑块型芯与推杆发生干涉而设置了预复位机构；
Hydraulic drawing-core mechanism was adopted for two-side of inner-sinking in the die casting die, and pre-resetting mechanism was set to avoid the interference of core slide with ejector pin.
压铸件内凹处两侧采用液压抽芯机构抽芯，为防止滑块型芯与推杆发生干涉而设置了预复位机构；
Hydraulic drawing-core mechanism was adopted for two-side of inner-sinking in the die casting die, and pre-resetting mechanism was set to avoid the interference of core slide with ejector pin.
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