Valve Breakage. Any condition that causes the valve to overheat or to be subjected to heavy pounding (as from excessive tappet clearance or from detonation ) may cause valves to Break.
气门过热或遭受重载（气门杆间隙过大或爆裂）均可造成气门破裂。
The effects of micro-hole valve of homogenizer on bacteria's surface structure showed cell wall friction damage and cell membrane breakage.
微孔均质阀对细菌表层结构的破坏形式表现为细胞壁擦伤和细胞膜破裂。
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