According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau, some key problems in the research of nutrient biogeochemical cycle have been discussed.

The level of soil total phosphorus content as follows: marsh soil Soil meadow black soil forest brown soil.

土壤全磷含量高低表现为：沼泽土黑土草甸黑土森林棕壤土。

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Study on Water Requirement of Black Locust Forest in Semi-arid Region on Loess Plateau of Northwest Shanxi

晋西黄土高原半干旱区刺槐林分需水量的研究二十世纪三四十年代晋西北的农业雇工

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Influence of Black Locust Forest Improvement on the Water Situation of Forest land

刺槐林更新改造对林地水分环境的影响

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The great black forest stern as it showed itself to those who brought the guilt and troubles of the world into its bosom became the playmate of the lonely infant, as well as it knew how.

那座阴森森的大树林对那些把世间的罪孽和烦恼都装进胸扉的人们来说，虽然显得那么严厉，但却成了那孤独的幼儿的玩伴，而且懂得怎么陪着她玩。

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On day, when the gods got together for a banquet, a monster with many heads and eyes from the black forest rushed into the hall.

然而有一天，正当众神设宴欢聚的时候，黑森林里的多头百眼兽却突然窜进了大厅！

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Founded in 1960 in Schopfloch, in the Black Forest, Homag is one of those little-known world champions that are the backbone of the German economy.

位于德国山林区绍普夫洛赫的豪迈公司成立于1960年。德国有许多低知名度的世界顶级公司，他们是德国经济的脊梁，而豪迈公司正是其中的一员。

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the solid walls of the black forest soften to grey, and vast stretches of the river open up and reveal themselves;

那一片黑压压的森林，如城垣一般坚不可摧，也缓缓地被日光融化成灰色，广阔的水域也渐渐清晰，映入眼帘；

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The black forest fire is burning quite close to where the Waldo Canyon fire burned last summer.

黑森林大火的发生地与去年夏天沃尔多峡谷火灾的发生地距离很近。

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A shareholder stand-off in the Black Forest.

山林地区股东的势均力敌之争。

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I'll walk to the depths of the deepest black forest.

我将毅然走进那黑暗森林的最深处。

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But a large portion of the Black Forest fire burned area remains evacuated.

但是黑森林火灾烧毁的大部分区域仍然要继续疏散。

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As many as 100 homes may have been destroyed in black forest.

最多有100所房屋被黑森林大火烧毁。

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Metal bellows mechanical seal

金属波纹管机械密封

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Application of bellows mechanical seal in series in the pump at the decompression tower bottom

串联式波纹管机械密封在减底泵上的应用

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Development of Domestically Manufactured Bellows Mechanical Seal for Benzene Anhydride Pump

苯酐泵波纹管机械密封国产化的研制

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Application of Inconel 718 to produce welding bellows mechanical seal

Inconel718在热油泵波纹管机械密封中的应用

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With bellows seal can solve this problem.

采用波纹管密封可彻底解决这个问题。

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Testing on balanced metal bellows seal Research on Metal Bellows of Special Purpose

平衡型波纹管式机械密封试验研究特种金属波纹管研制

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At high temperature, metallic bellows seal can be adopted;

高温条件时采用金属波纹管机械密封；

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Madonna also seemed to be more concerned about TigerWoods and did not even show an interest in the blesbok.

麦当娜看起来也很关心虎伍兹，她甚至都不再去注意那些白面大羚羊了。

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