Rick Mastracchio and Mike Hopkins removed a faulty ammonia pump Saturday, December 21 while working outside the orbiter for more than five hours.
ນັກເຫາະອາວະກາດ ອອກໄປຊ່ອມແປງ ຢູ່ນອກສະຖານີ

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Astronauts Michael Hopkins and Rick Mastracchio perform a series of spacewalks outside the International Space Station in this Dec. 21, 2013 still image taken from a NASA handout video.