孔堵塞 meaning in English

blocking of pores

Study on reduction of membrane internal fouling in mbr
中膜孔堵塞控制方法的研究
The decisive factors causing whether the blast hole is plugged up
决定炮孔堵塞与否的因素
Yet in imitating candles or oil lamps in our salons , we hide the apertures of the gas pipes ; in illumination , on the other hand , we pierce the pipes with innumerable small openings , so that all sorts of stars , firewheels , pyramids , escutcheons , inscriptions , and so on seem to float before the walls of our houses , as if supported by invisible hands
在我们沙龙模拟蜡烛或汽油灯的活动中，我们将煤油管的孔堵塞，同时，为了照明我们将管子开了无数个小孔，这样就有各式各样的星星、火轮、金字塔、纹章盾、碑铭等等看上去经过一只看不见的手从我们房子的墙壁前流出。