The valve head may be made by single press and sintering, double press and sintering, forging and machining, forging and sintering, and dynamic magnetic compaction and sintering.

气门头可通过一次压制和烧结、两次压制和烧结、锻造和机加工、锻造和烧结及动磁压制成形和烧结而制成。

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Tagging: Hit the double up-arrow at the bottom of the post window (or press “F2″) and a range of other options will open up, including a tagging field.

标签云集： 点击发表栏底部的双向上箭头（或者按F2）之后将会出现一个新的选项区域，标签设置栏就在这里。

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Discover the hierarchical tree structure classes by finding the class in the Model Explorer, double-click to open the class in the editor, and press F4 to open the hierarchy tree.

通过寻找模型搜索器中的类，找出等级树状结构类，双击打开编辑器中的类，按下f 4以打开等级树。

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But, you might say, that should surely double the resolve of the press to hold them to account.

BBC: Why have we left bank reform to technocrats?

They spelt it P O double L Y in their press release.

BBC: Rocky times

The head of the British-based team, Dr. Miodrag Stojkovic, told The Associated Press that the double breakthrough proved that stem cell techniques could be successful in humans.

CNN: Cloning success hailed, feared