Tool electrode ultrasonic vibration aided gas medium EDM technology was proposed and correspondingexperiment system was designed.

提出了工具电极超声振动辅助气体介质电火花加工方法。

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The stainless steel powder becomes finer and the size distribution is narrower with the mass flow rate and pressure of gas medium increasing.

随着气体介质流量及压力的增加，所制备的不锈钢粉末粒度越小，粉末的分布更集中；

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Keeping the oxygen content of the injection gas below 15%, possibly by introducing some N_2 into the gas medium, will prevent coal explosion.

控制制粉和喷吹系统中的含氧量在15％以下，可以防止煤粉爆炸，降低气氛中含氧量可以采用充惰性气体的办法。

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Gas shale exploration is being done mainly by small to medium sized companies.

VOA: special.2009.10.23

Heat a gas grill to medium-high or light a charcoal fire and let it burn just until the coals are covered with gray ash.

NPR: A Meal Fit For A Candidate: Barack Obama

Conversely, it would also be a mistake to encourage, via policy and long-term subsidy, more costly technologies to crowd out natural gas in the short to medium term, as this could significantly increase the cost of CO2 reduction.

FORBES: MIT: The Future Is A (Natural) Gas

Its engine segment (49% of net sales in 2010) produces a wide range of engines that run on diesel and natural gas used in heavy-, medium- and light-duty trucks, buses, automobiles, RVs, and industrial vehicles.

FORBES: CMI Ready To Rev Higher