| 摘要 |
A portable building has a floor formed by a series of side-by-side rectangular concrete floor slabs, a front formed by at least one front wall panel, a rear formed by at least one concrete rear wall panel, two opposite sides each formed by at least one concrete side wall panel standing on relevant floor slabs, and a roof formed by a series of side-by-side rectangular concrete roof slabs resting on the upper ends of respective front and rear wall panels and, where relevant, on the upper ends of side wall panels.
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