A developing trend for the high-speed centrifugal compressor is predicted. The non-oil seal will gradually take the place of the wet seal and it will obtain zero leakage of the seal unit.是什么意思_A developing trend for the high-speed centrifugal compressor is predicted. The non-oil seal will gradually take the place of the wet seal and it will obtain zero leakage of the seal unit.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句