The valve flaps are semicircular.
答案解析
解析:
那么,让我们通过生动有趣的例子来帮助你更好地理解。想象一下,阀门瓣片就像是一个圆形的扇叶,但是被切成了两半,就像一个圆形的披萨被切成了两半一样。这样的形状可以更好地控制液体或气体的流动,因为它可以在需要时完全关闭或打开,就像打开或关闭一个半圆形的门一样。
相关知识点:
阀门瓣片是半圆形的形状
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