The standard upper seal is constructed using Silicon Carbide vs. Carbon because the environment of the upper seal is an oil bath and is normally not subjected to the pumped media.是什么意思_The standard upper seal is constructed using Silicon Carbide vs. Carbon because the environment of the upper seal is an oil bath and is normally not subjected to the pumped media.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句