The finish oil content of PET staple fiber was determined by extraction weight method, extraction light refraction method, instant test method and nuclear magnetic resonance spectroscopy.是什么意思_The finish oil content of PET staple fiber was determined by extraction weight method, extraction light refraction method, instant test method and nuclear magnetic resonance spectroscopy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句