| 单词 | welt |
| 释义 | welt [welt] BUILDING CONSTRUCTION 1. In sheet-metal roofing, a seam consisting of two joined sheets of metal whose edges have been folded over each other and fastened down flat. 2. A strip of wood fastened over a flush seam or joint for added strength. ENGINEERING A strip that has been fastened to the edges of plates that form a butt joint in a steam boiler. |
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