1、The law required apartment buildings to be of fire-retardant construction.
法律規(guī)定所有公寓房屋都應(yīng)該是耐火的建筑物。

2、Plastics modified with fire-retardant have been the topic for recent years.
塑料的阻燃改性一直是近年來人們研究的熱點(diǎn)。

3、Have the highest wood fire-retardant grade B1.
具有木質(zhì)最高的防火等級B1。