操作员调运巨桶混凝土，下面的工程师则指示正确的浇灌位置。
As the operators swing the enormous bucket of concrete, engineers below indicate the exact spot where it should be poured.
文中针对三种不同粮库的工程特点，介绍了从原材料选择、现场保温措施、混凝土浇灌、养护等的全过程。
Based on the characteristics of three different grain depots, the paper introduces the process of selection of materials, thermal insulation, concrete placing and curing.
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