Workpiece surface roughness is an important technical index in evaluating the ground quality of belt grinding.

砂带磨削中，表面粗糙度是被磨工件表面质量的一个重要的技术指标。

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These factors include importance of the dam, severity of the ground motion, occurrence or lack of observed damage, and availability of quality strong motion records at or near the dam.

这些因素包括：大坝的重要性，地震时地面运动的程度，大坝出现或没有出现重大损坏，以及在当地或附近发生强震时大坝质量的可靠性。

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Therefore, we like to establish some ground rules in our group, and look forward to improve the quality of it, holding hands with our friends here and moving forward all together.

特此，在群里做出以下规定，期望大家齐心把群的质量办上去，和群友们一起进步。

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This car generates real, live, Le Mans-quality ground effects, and it is ferocious.

WSJ: Pagani Huayra Review: If Da Vinci Made a Sports Car | Rumble Seat by Dan Neil

But IBM claims the high ground on the quality issue.

CNN: Notebook prices to flatten, IBM says

It was a long-awaited victory for the Toffees and a deserved one after they showed the greater ambition and quality at a ground that had become something of a fortress for Birmingham.

BBC: Birmingham 0-2 Everton