The tensile strength of the core yarn is the highest, the second is the folded yarn, and the lowest is the wrapped yarn.

包芯纱具有较高的断裂强力，其次是平行纱，而包缠纱的最低；

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The protection that wrapped yarn gives to the high performance core yarn improves the weaving performance of core spun yarn.

外层编织纱对高性能芯纱的保护使复合后的纱线的织造性能得到很大改善，可直接在二维或三维织机上进行织造。

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The strength and elongation properties of the loop yarn is mainly decided by the core yarn.

圈圈线的强伸性能主要由芯纱决定；

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Baker tells me he can make a sock core just as cheaply as anyone in China or Honduras - the machine costs the same, so does the yarn, there's hardly any labor.

NPR: Alabama Town Questions an Economy of Socks