A.着火罐和着火罐直径2倍范围内的相邻罐 B.着火罐和着火罐直径1.2倍范围内的相邻罐 C.着火罐和着火罐直径1.8倍范围内的相邻罐 D.着火罐和着火罐直径1.5倍范围内的相邻罐
A.0.35 L/s·m B.0.45 L/s·m C.0.8 L/s·m D.0.6 L/s·m
A.6h B.4h C.3h D.2h