?内层绒毛
... 曝光不足 underexposure 地毯垫毡 underfelt 内层绒毛 underfleece ...
骆驼原绒
山羊绒纤维
That means separating the unwanted coarse outer hair of the goats from the valuable ultrafine cashmere underfleece, which measures just 12 to 18 microns in width (one sheep wool fiber is more like 25 microns wide).
FORBES: Magazine Article
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