The term open-hearth furnace is identified in base64 scheme by the sequence b3Blbi1oZWFydGggZnVybmFjZQ==, while the MD5 signature is equal to 69e493a05cd4060c5c866f6fe7abe541. The ASCII encoding of open-hearth furnace in hexadecimal notation is 6f70656e2d686561727468206675726e616365.