The great speed and force of tornado winds can pick up things as heavy as automobiles and hurl them hundreds of yards. (4) The updraft causes a very low air pressure within the funnel.
龙卷风的速度快，力量大，能卷起像汽车那样的重物，把它们抛到几百码以外。上升的气流，在龙卷风的漏斗中引起低气压。
With the charging features of the air braking system on the 10 000 t heavy haul train as the research object, the change of pressure in the auxiliary reservoir during charging on train is researched.
以万吨重载列车空气制动系统的充气特性作为研究对象，研究副风缸在列车充气作用时的压力变化情况。
With the charging features of the air braking system on the 10 000 t heavy haul train as the research object, the change of pressure in the auxiliary reservoir during charging on train is researched.
以万吨重载列车空气制动系统的充气特性作为研究对象，研究副风缸在列车充气作用时的压力变化情况。
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