"We now have a high volume process for manufacturing sodium fill valves," said Schaefer. "We drill the holes, fill them with sodium and seal them all in one step."

“我们现在拥有了一种高集成的中空充钠气门生产工艺，”Schaefer说，“钻孔填钠密封，一步就可以搞定。”

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In general can be twist drill hole, but you should drill holes, step and then expanded to the required diameter.

用一般的麻花钻即可开孔，但应先钻小孔，然后步扩大到所需直径。

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From each high-level step, "drill down" to a more detailed flowchart on a new page.

从每一高级步骤，“深入”到新页上更详细的流程图。

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First of all, the relief valve is the final and most assured final step -- that would be to essentially drill down the 19, 000 feet to where the formation is and to block off the well that is now open.

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Search the website the old-fashioned way, read step-by-step guides, browse popular topics, or start with a category and drill down from there.

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