pit-type temperting electric resistance furnace

This article discusses the well pattern optimization of oilfield gathering and transferring system under regular well net condition,puts forward the theory and method of well pattern optimization for metering station.

讨论了规则井网条件下油田集输系统计量站并式优选问题，提出了计量钻井式优选的理论和方法。

The advantages and disavantages of the runnerless injection mould for the well type nozzles are analyzed.

分析了井式喷嘴无流道注射模的优缺点,提出了井室容量的计算公式,并以此为依据绘制了确定井室直径的列线图,阐述了防止井室内熔融树脂冷却固化的方法,最后以安全头盔为例介绍了井式喷嘴无流道注射模的应用。

On the basis of investigation and analysis of gas fired well-type furnaces' explosion accidents due to backfire, causes of the accidents were found out.

通过对燃用煤气的井式炉群回火爆炸事故的调研分析,找出了事故产生的原因,提出了避免事故发生应当采取的措施,并对今后修订《工业企业煤气安全规程》GB6222-86提出了建议。

The developmental and variable rules of heat value for coal gas of underground gasification without shaft style in steep coal seam is described.

指出了急倾斜煤层无井式地下气化煤气热值的发展变化规律。

This system has higher con-trolling precision and reliability,and is suitable for the control of gas,carburizing of the one or multi-ple pit furnaces.

该系统具有较高的控制精度和可靠性，适用于单台或多台井式炉气体渗碳的控制。