用于各种织物的圆形取样，供测定织物单位面积质量。
Used for sampling the roundness sample of all kinds of fabric to test whose weight of unit area.
用于各种织物的圆形取样，以测定单位面积的质量。
Used for sampling the roundness sample of all kinds of fabric to test whose weight of unit area.
用于各种织物的圆形取样，以测定单位面积的质量。
Used for sampling the roundness sample of all kinds of fabric to test whose weight of unit area.
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