火灾科学技术人员学会如何测试防火阻燃材料和灭火设备的安全。

Fire science technicians learn how to test the safety of fire-retardant materials and fire suppression devices.

youdao

火灾科学技术人员学会如何测试防火阻燃材料和灭火设备的安全。

Fire science technicians learn how to test the safety of fire-retardant materials and fire suppression devices.

youdao