to take my cylinder now, and the external pressure and the internal pressure are not going to be I'm going to start with my cylinder here, I'm going to put little pegs here so it doesn't fly up.
活塞内外的,压强不相等,我们在,放上插销,以防止活塞。
Then I'm going to release these little pegs here and my piston is going to shoot up now p1 because p2 is less than p1.
现在移开插销,活塞就会往上冲,因为p2小于。
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