针对低瓦斯炮采工作面上隅角瓦斯治理，利用本层上采空区泄压释放，进行尝试实验，效果明显。
Aimed at top corner gas management at the low gas blasting face, by upper goaf drainage with decompression in self coal seam, the experience is tried, the effect is obvious.
本实用新型公开了一种用于消防灭火的水雾炮喷嘴。
The utility model discloses a nozzle of a water mist gun, which is used for fire fighting fire extinction.
本实用新型为一种篮球架，现有炮式篮球架金属材料消耗量大，制造和运输成本高。
The utility model relates to a basketball stand. The existing gun type basketball stand has the disadvantages of large metal material consumption, and high manufacture and transportation cost.
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