1 已知传热系数 K =1250kcaL/(m 2 ·h· °C ) ,在 SI 制中, K =_____W/(m 2 ·K) ;汽化潜热 r =2200kJ/kg ,在工程单位制中 r =_______kcaL/kg 。 2 普兰德准数的定义式是 __________________ 。
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