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US4861188A Apparatus for levelling concrete 失效
水泥混凝土设备

Apparatus for levelling concrete
摘要:
This invention relates to a method and an apparatus for compacting and smoothing freshly poured concrete during the construction of a floor or other flat surface. The apparatus is a screed divided in two portions. The first portion is used to level, compact and remove excess concrete and the second portion allows the screed to float on the freshly poured and soft concrete.
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