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attraction to the center of the earth
释义
attraction to the center of the earth
地心引力
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shielded metal (manual electric) arc welding
shielded nucleus
shielded nuclide
shielded oscillator
shielded pair
shielded pair cable
shielded-plate tube
shielded plug
shielded pole instrument
shielded-pole motor
shielded probe
shielded thermocouple
shielded transformer
shielded wire
shield effectiveness
shield engineering
shield facility
shield factor
shield gas
shield gas flow rate
shield grafting
shield grid
shield-grid thyratron
shield inert gas metal arc welding
shielding
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