circumferential rib tread pattern 纵向花纹
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This ply is arranged such that in sensitive zones, for example, beneath the grooves of the tread pattern, the laying pitch of the circumferential reinforcing threads is greatly increased.
这层是这样安排的，在敏感地区，例如，下面的胎面花纹的凹槽，该周加强往来铺设沥青，大大增加了。
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