The artillery is capable of both in-direct and direct firing.

火炮能够在两者间接和直接开火。

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Effect of furnace wall emissivity on surface heat flux of heated stock is analyzed for direct firing furnace and indirect heating furnace.

分析了炉壁黑度对炉膛辐射换热流的影响，分别对火焰直接加热炉和间接加热炉进行了讨论。

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The separator directly affects the output and coal fineness as one of the most important parts of positive pressure direct firing coal pulverizing system.

分离器作为正压直吹制粉系统中的重要部件，直接影响到制粉系统的出力和煤粉细度。

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The peacekeeping chief's spokesman called the firing on peacekeepers' vehicles "deliberate and direct, " and said U.N. officials were evaluating whether the 300 unarmed peacekeepers in Syria are safe enough to continue their activities.

CNN: STORY HIGHLIGHTS