桑蚕双宫丝特征标准样品（样照）是双宫丝特征检验必备的标准参照物，在制作中有特殊的技术要求。
The standard sample photograph for features of mulberry doupion silk is an indispensable standard reference in the inspection of the doupion silk.
桑蚕双宫丝特征标准样品（样照）是双宫丝特征检验必备的标准参照物，在制作中有特殊的技术要求。
The standard sample photograph for features of mulberry doupion silk is an indispensable standard reference in the inspection of the doupion silk.
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