A too narrow sealing surface of the lamella combined with the improper material quality of the lamella is the main cause affecting the annular scars on the safety value.是什么意思_A too narrow sealing surface of the lamella combined with the improper material quality of the lamella is the main cause affecting the annular scars on the safety value.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句