(垫在地毯下的)地毯垫
Traditional woollen underfelt is very attractive to moths and carpet beetles and can harbour infestation.
传统粗纺是很有吸引力,飞蛾和地毯甲虫经常对其造成侵扰。
underfelt:地毯垫毡
"曝光不足","underexposure" | "地毯垫毡","underfelt" | "内层绒毛","underfleece"