An oil derrick is a necessary supporting frame, and plays an important role in oil production.

采油井架钢结构是钻采石油时所必需的支架结构，对油田生产起着重要作用。

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There are brackets, columns, beams and rafters, the sparrow house, consisting of supporting frame.

屋内有柱、斗拱、雀替、梁、椽木等，组成撑架。

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The structure of supporting frame and short struts is more flexible than that of only supporting frame.

支架结构为支撑体加连接筋比只依靠支撑体连接时柔顺性要好很多；

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The towers were "built as a pipe, " with the steel frame of its exterior facade supporting the buildings, he told CNN.

CNN: Debate begins on rebuilding towers

The battery support is also constructed from aluminium, the frame and oval piping is made from steel, while the seat is self-supporting.

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