Pre and post treatment arch width was measured.

比较治疗前后牙弓宽度变化。

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The paper also introduces the design of the top supported pre-stressed tied arch and the main conclusions.

简要介绍了上承式预应力拉杆拱渡槽支承结构的设计和相关结论。

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Today the more and more lifting equipment in middle or lower arch bridge are using pre-forced steel wring line and pre-forced anchor system.

目前，中(下)承式拱桥吊杆越来越多的采用预应力钢绞线和预应力群锚锚固体系。

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Phil Mickelson is defending the title that he won a year ago, while most of the pre-tournament attention is focused on his arch rival, Tiger Woods.

NPR: Tiger Woods Rolls into PGA Championship

The A380, the superjumbo from Boeing's arch-rival Airbus, has had its own travails, both pre-certification, when the whole wiring infrastructure was called into question, and after service-entry when cracks were discovered in wing ribs.

CNN: How Boeing can bounce back from Dreamliner problems