hollow beam
短語(yǔ)詞組
- hollow electron beam [電子]空心電子束;中空電子束
- Hollow Flange Beam 空翼緣梁
- hollow no beam roof 空心無(wú)梁樓蓋
- hollow girder beam 空心板梁
- hollow w beam 空心梁
- prestressed hollow plate beam 先張空心板梁
- hollow arbor beam 琯梁
- hollow board beam 空心板梁 返回 hollow beam