A narrow steel sheet with one-folding extends out of a barrel-shaped steeljacket and the side wall of the end surface, and the narrow steel sheet is fixed with a bronze needle.
由圆桶状钢套及其端面侧壁伸出带一折的窄钢片，在窄钢片上固定有一根铜针。
2
With the development of the petroleum and gas resource in our deep sea areas, the transportation of the steeljacket to the deeper water areas will become more and more important.
随着我国深海油气资源的逐步开发，钢质导管架平台向更深水域的运输变得越来越重要。
3
During constructing the bored plies or enlarging the foundations, the lighter and more convenient steeljacket box may be used instead of using the steel sheet pile as the cofferdam.