The test results indicate that long hole blasting in the crossing hole can improve the suction quantity of firedamp effectively.

理论研究和试验都表明 ，采用爆破方法可以增加瓦斯?。

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The principle of increasing gas emission rate by long hole blasting in the crossing hole is discussed. The radius cracked zone in coal seam caused by long hole blasting is calculated.

简要论述了深孔爆破提高瓦斯抽放的机理，以煤体中柱状装药爆炸后的裂隙圈半径进行了计算。

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This paper analyzes the drillability, hole-making and carry of coarse grain concerning the Nubia sandstone, and concludes that it is suitable to be the crossing strata.

在可钻性、成孔性及粗颗粒可携带性等方面对努比亚砂岩进行了分析，认为将其作为穿越地层是可行的。

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Brian was super young and a guy and had a lot less to lose by crossing the border into Canada on the roof of a round-hole hopper.

NPR: Hobo, Interrupted, Still 'Dreams of Trains'

At the last hole his drive finished on Granny Clark's Wynd, the road crossing the fairway, but he hit his second off the tarmac to six feet and made it for yet another birdie.

BBC: Martin Kaymer wins Dunhill Links Championship