available height of derrick [油气] 井架有效高度
They can be set up on the smallest available floor space directly next to the work station concerned, making optimum use of the available height.
它们可以建立在现有面积最小的直接旁边工作站，最大限度利用现有的高度。
I have used all available resources on the internet to find and verify the exact height of the tallest building in every country.
我在互联网上使用一切可用资源，查找验证每一个国家最高建筑的准确高度。
I've used every resource available on the Internet to find and verify the tallest building in every country, with the most accurate height available.
我已经在互联网上使用一切可用资源，发现和验证每一个国家最高的建筑准确的高度。
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