新款发球杆将超快速科技（SuperFast）与双层冠部（Dual Crown）技术进一步改良并巧妙结合于一体，可成就更快的挥杆速度、更高的发球角度以及较低的倒旋速度，大大提升球距。
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Dual Crown Technology 双冠技术 ; 基于双层冠部技术
dual crown
双皇冠
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Methods: 14 fractured crown fragments of incisors were immediate reattached using dual-curing resin cement system.
方法：14例冠折上前牙用双重固化树脂粘接系统进行断端即刻再接修复，临床观察1年。
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If you're scoring at home, NVIDIA currently holds the lead in single-GPU graphics cards with its GeForce GTX 580, but ATI's dual-chip Radeon HD 5970 has been holding down the absolute speed crown for a good long while.
ENGADGET: AMD launches Radeon HD 6990 powerhouse for $699, maintains 'world's fastest' title
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