MT-21 Mobile Mining Unit – 7648 lego guide 7 years ago BUILDING INSTRUCTIONS FOR 7648, MT-21 Mobile Mining Unit, Space Set Number: 7648 Theme: Space Launch Year: 2007 MT-21 Mobile Mining Unit – 7648 File Size – 3.59 Mb Description – BUILDING INSTR. FOR 7648Download MT-21 Mobile Mining Unit – 7648 building instruction Print Versions Building instructions labeled “NA” or “V39” may be printed on US standard letter size paper Building instructions labeled “IN” or “V29” may be printed on EU standard A4 paper