单词 | working beam |
释义 | Definition of working beam in English:working beamnoun Mechanics historical
OriginMid 18th century; earliest use found in John Desaguliers (1683–1744), natural philosopher and engineer. Definition of working beam in US English:working beamnoun Mechanics historical
OriginMid 18th century; earliest use found in John Desaguliers (1683–1744), natural philosopher and engineer. |
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