gas hole

基本解釋

This paper analyses theoretically and technologically, the reason of barrel tooth holders sealing off , of produced gas hole and cold crack.
從理論和工藝上分析滾筒齒座開銲的原因、氣孔的産生和怎樣減少氣孔生成、冷裂現(xiàn)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.
水力模擬依據(jù)相似理論，建立水力模型，選出最佳澆注系統(tǒng)，防止吸氣、澆不足等缺陷；
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.
本文介紹了採(cǎi)用煤躰注水法均勻釋放瓦斯，增加卸壓孔和瓦斯釋放孔，穿層鑽孔抽放，順層鑽孔抽放，增加煤躰透氣性，使煤躰卸壓，達(dá)到瓦斯釋放傚果。

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