作者: John D. Homan
DOI:
关键词: Spring (mathematics) 、 Base (geometry) 、 Engineering 、 Structural engineering 、 Wallpaper
摘要: An elongated, open-topped bucket has a trapezoidal cross-section, with the smaller base below. The bottom of an elongated slit into which wallpaper may be introduced. A flexible lip inside guides up against rear wall and prevents paste in from leaking out bottom. At top are skimming blade corrugated raking that cooperate to remove all but proper amount as is withdrawn bucket. blades spring loaded independently loaded.