这句翻译不知道怎么处理,请大家指教!pitting of valve? where practical "roll" or "drop-out" all control valves to prevent pitting of the valve seats due to deposition of debris on the seat. 这里pitting不是点蚀,应该是凹痕或麻坑,debris可能是金属碎屑、焊 ... 支持pitting的解释。有杂质在阀座上容易引起划伤或者压痕,导致泄漏。查看更多