tussah spun silk yarn 柞绢纺丝 ; 柞绢丝
unbleached tussah spun silk yarn 灰柞绢丝
bleached tussah spun silk yarn 药柞绢丝
tussah h silk spun yarn 柞蚕绢丝
tussah h spun silk yarn 柞绢纺丝
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