以下为句子列表：
英文: Seat bores and minimum flows are crucial in check valve selection. Without proper sizing, extreme damage can occur in check valve internals. Pulsed flow reversals can also cause damage.
中文: 阀座孔和最小流量对于止回阀的选型至关重要。没有适当的通径，可能会造成止回阀内部严重损坏。脉冲式倒流也可能导致损坏。
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