The machines have been sifting through the rubble from the school, crushing it to be moved out of the area.
许多机器一直从学校废址上的碎石上碾过，把他们压碎，以便能运出去。
Crushing: Paper defect affecting a small area and showing as a visible surface fault.
压痕：纸面故障，它影响的面积小，但瑕疵显。
The turbulence kinetic energy and crushing strength is increased with the increasing of squish area.
适当增大挤气面积，可增大逆挤流强度，提高缸内湍流动能，促进火焰传播。
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