Oxygen gas transmission rate ( O2 GTR ) is determined after the package has been mounted on a test fixture and has equilibrated in the test environment.是什么意思_Oxygen gas transmission rate ( O2 GTR ) is determined after the package has been mounted on a test fixture and has equilibrated in the test environment.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句