ADJ made of two thicknesses, layers, or strands 两层的; 双股的
N a two-ply wood, knitting yarn, etc 双层木; 双股毛线
We usually buy two-ply toilet paper.
我们通常买双层的厕纸。
This simple analysis holds only for two-ply yarns.
这些简单的分析只适合于由两根单纱合股成的纱线。
The internal torque on each of the singles will be about 300 TPM, while torque on the two-ply yarn will be 100 in the s direction.
每根单纱的内部扭转力就达到了300tpm，然而合股线在S捻方向上的扭转力是100tpm。
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