gas hole

基本解释

This paper analyses theoretically and technologically, the reason of barrel tooth holders sealing off , of produced gas hole and cold crack.
从理论和工艺上分析滚筒齿座开焊的原因、气孔的产生和怎样减少气孔生成、冷裂现象生成及其予防。
Based on analogic theory, hydraulic model was founded to choose the optimum gating system for prevention from casting defects including gas hole and misrun.
水力模拟依据相似理论，建立水力模型，选出最佳浇注系统，防止吸气、浇不足等缺陷；
chazidian.com
That is to say, to increase discharged-pressure hole and gas releasing hole, improve coalfield ventilation to release pressure by getting into deep and natural drilling.
本文介绍了采用煤体注水法均匀释放瓦斯，增加卸压孔和瓦斯释放孔，穿层钻孔抽放，顺层钻孔抽放，增加煤体透气性，使煤体卸压，达到瓦斯释放效果。

Importantly, this mud also acts as a kind of plug in the hole, preventing any oil and gas from blasting up out of the hole.
FORBES: Blowout Suspected in Transocean Rig Explosion
This allowed natural gas to migrate up the hole and explode at the surface.
FORBES: The Fracking Solution Is A Good Cement Job
The violent encounter would have stripped away most of the dwarf galaxy's stars, but it also could have compressed the gas around its central black hole, triggering a new wave of star formation.
MSN: Rare Black Hole Survives Galaxy's Destruction