noun
: a group of steel rollers assembled together in a frame and placed under the end of a bridge truss or girder and on a bearing plate to permit expansion and contraction to occur without restraint
noun
: a group of steel rollers assembled together in a frame and placed under the end of a bridge truss or girder and on a bearing plate to permit expansion and contraction to occur without restraint
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012