1. A steel joist or girder with short flanges and a cross section formed like the letter I. 
   i形金属横梁，工字梁由短翼缘和一个十字部分做成象字母i的钢制托梁或主梁
2. A timber or girder fastened above and parallel to the keel of a ship or boat for additional strength. 
   内龙骨固定在船或舟的龙骨之上或与之平行的木材或桁，以加强船的力量

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• 1. 悬臂梁
  socle beam 悬臂梁...socle girder 悬臂梁...soda bath 碱浴, 苏打浴
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