1) self-venting n.
自行通风
2) self-ventilated
自行通风的
3) self-ventilated
自行通风，自冷
4) self-ventilated machine
自行通风式电机
5) self-ventilated motor
自行通风式电动机
6) downward ventilation
下行通风
1.
Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential;
近水平突出煤层回采工作面下行通风应用研究
2.
Field experiments using downward ventilation were studied and the gas emission and distribution laws at the goaf working face were discussed.
结果表明,在采用下行通风后,采空区绝对瓦斯涌出量为上行风时的80%,工作面φ(CH4)下降了75%,瓦斯不再超限。
补充资料：下行
1.文字自上而下直写直排的形式。汉字在改为横写横排以前，书写和印刷都是从上到下的，故称"下行"。 2.公文从上级发往下级。 3.船从上游向下游行驶。 4.指声音从高到低。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条