混凝土冬期施工方法和措施
(1)改善混凝土配合比 (2)原料加热,提高混凝土入模温度 (3)蓄热保温养护,或加热养护 (4)掺外加剂 (5)热拌混凝土
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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