• 2022-11-03
    测得某梯形巷道通过的风量为[img=92x27]1803d60ce47521e.png[/img]时的通风阻力为128Pa,则该巷道的风阻为( )
    未知类型:{'options': ['8[img=62x27]1803d60ced79f45.png[/img]', '0.000139[img=62x27]1803d60ced79f45.png[/img]', '0.133[img=62x27]1803d60ced79f45.png[/img]', '0.5[img=62x27]1803d60ced79f45.png[/img]'], 'type': 102}