The location of the beam on the other hand can be determined on the top side: this is where the floorboards are nailed to the beams.
另一方面，龙骨所处的位置可以从顶端判断出来：楼板都是钉在龙骨的这个地方。
The location of the beam on the other hand can be determined on the top side: this is where the floorboards are nailed to the beams.
另一方面，龙骨所处的位置可以从顶端判断出来：楼板都是钉在龙骨的这个地方。
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