Hardened seating surfaces? Both disc and body seating surfaces are hard faced for maximum service life.

硬化的阀座表面？阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。

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Hardened seating surfaces - both disc and body seating surfaces are hard faced for maximum service life.

硬化的阀座表面—阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。

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Introduce the test model, method and the analysis results of the soft faced gate valve, to carry on the comparison structure and functions of soft faced gate valve and hard faced gate valve.

介绍了软密封闸阀的测试模型、方法及分析结果，对软密封和硬密封闸阀的结构及性能进行了比较和分析。

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When they had gathered all the supplies, the gold seekers then faced the extremely hard trip into Canada.

VOA: special.2009.02.11

New protests groups would be formed in a few years when farmers once again faced hard times.

VOA: special.2010.04.15

"I was always one of these kids who had the smart back-answer in school - a right hard-faced, cheeky young man, " he told Roy Plomley on a 1972 edition of Desert Island Discs.

BBC: Profile: Jimmy Tarbuck

They lived by selling their labour and when markets turned down they faced hard times.

BBC: A Point of View: The revolution of capitalism

Despite the hard times he faced in this early days at Geico, Mr. Byrne was known for a humorous approach.

WSJ: Jack Byrne: The Man Who Saved Floundering Geico