In the event of the machine not operating correctly, an error code will appear. 如果機器運轉不正常，就會(huì )出現錯誤代碼。
Check bit A binary bit added to the data stream during machine verification to enable the machine to detect errors. 校驗數元使機器在校驗時(shí)發(fā)覺(jué)錯誤的一個(gè)加在信息流內的二進(jìn)制數元。
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