独特的柱形设计在每一头都有对角线支撑，使其与上下楼层通过螺栓进行连接。
The unique column design has diagonal bracing at each end and tabs that bolt into the floors above and below.
安装采油树是要对角上紧螺栓。
Make up and tighten the bolts diagonally when the X-tree is installed.
当液力端连同背板位置调好之后，4个螺栓以对角方式拧紧，直到合适为止。
When the hydraulic end position together with the back well after the transfer, four bolts to tighten the diagonal way, until a suitable date.
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