防火层 fire-proofing ; fire protection layer ; fire blocking layer ; fire-resisting layer

隔火层 refuge floor

耐火层 refractory deposition ; flame retardant coating ; refractory layer ; Layer for fire-proof

阻火层 flame retardant bed ; fire barrier

隔膜防火层 membrane fireproofing

基性火层岩 basic igneous rock

奥氏体淬火层 austenitic quenched layer

淬火层深均匀性良好 depth of surface hardening is great