The safe production in coal face is directly influenced by the low pressure sealing quality of hydraulic props.
单体液压支柱低压密封质量，直接影响到工作面安全生产。
We adopt advanced four passages coal burner, improve the flame temperature, make a base of produce high quality low alkali clinker.
采用新型四通道煤粉燃烧器，提高火焰温度，为生产优质低碱熟料奠定了基础。
Supply by China's coking coal market assumes a growth trend in recent years. But the capacity of high quality supply is insufficient, while the capacity of low quality supply is surplus.
近两年我国炼焦煤市场供应呈增长态势，但高质量供应能力不足，而低质量供应能力过剩。
MPS type coal pulverizer features low electricity consumption, low noise and flexible adjustment, but the requirement for coal quality, especially for grindability factor is relatively sever.
MPS磨煤机具有耗电省、燥音低、调节灵活的特点，但对煤质尤其是可磨性系数的要求较为苛刻。
What the company managing are high quality and high caloric coal with low sulphur, low dust, low phosphorus, and low chlorine and coal's smelting and blowing.
公司经营的是低硫、低灰、低磷、低氯、高发热量的优用煤和冶炼吹煤。
The competitiveness of coal-derived natural gas lies in the use of low-price, low-quality coal and technologies needed are coal gasification and methane production techniques.
其竞争力主要源于可采用低价劣质煤，需要选择的主要是煤气化及甲烷化技术。
There are large coal fields in the vicinity of high-quality, low-cost inland through the Great Lakes and into the superior iron ore.
附近有优质大煤田，通过大湖和内河廉价运入苏必利尔的铁矿石。
There are large coal fields in the vicinity of high-quality, low-cost inland through the Great Lakes and into the superior iron ore.
附近有优质大煤田，通过大湖和内河廉价运入苏必利尔的铁矿石。
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