| 摘要 |
A power transmission belt has a compression section, a tension section, and a load carrying section. The load carrying section has a plurality of reinforcing cords. The reinforcing cords are formed from poly(p-phenylene-2,6-benzobisoxazole) (PBO). In each reinforcing cord, the cords have a yam twist greater than the cord twist, and the cord twist is in the range of one-forth to one-half of a ply twist.
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