an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles 同义词：catapult, arbalist, ballista, bricole, mangonel, onager, trebuchet, trebucket,
The arbalest (also arblast) was a late variation of the medieval European crossbow coming into use during the 12th century. A large weapon, the arbalest had a steel prod ("bow").
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