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ᴅᴇꜰɪɴᴇ ᴡᴏʀᴋɪɴɢ ᴍᴏᴅᴇʟ? |
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Answer» a MODEL of an ACTUAL or PROPOSED machine that can do on a SMALL scale the work which the machine itself does or is expected to do a working model of a FREIGHT locomotive. |
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