Structure of safety grade two, refractory categories for the class, grade two, building seismic fortification intensity is 7 degrees.
结构的安全等级为二级，耐火类别为丁类、防火等级为二级，建筑物抗震设防烈度为7度。
Structure of safety grade two, refractory categories for the class, grade two, building seismic fortification intensity is 7 degrees.
结构的安全等级为二级，耐火类别为丁类、防火等级为二级，建筑物抗震设防烈度为7度。
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