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。
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