roof coverings屋面: roofing; roof covering; roof覆盖层: overburden; superstratum; ba ...易燃屋面覆盖层: flammable roof covering预制屋面覆盖层: prepared roof covering阻燃屋面覆盖层: fire-retardant roof covering下载手机词典可随时随地查词查翻译