It is composed of casing flange, casing cross joint, wellhead valves, tubing hanger, tubing head cross joint and accessories.
这种井口装置由套管法兰、套管大四通、井口阀、油管挂、油管挂体及相关附件组成。
The only failure I've personally seen from high tension is a hub flange failure on a two-cross wheel.
唯一的失败我个人看到的是由高张力对两跨轮毂法兰失败。
Analysis shows that it is the best way to improve the stress distribution of the twin-box single cross section of cable-stayed bridge by thickening the bottom flange.
分析表明：加厚底板对斜拉桥双箱单室箱形主梁应力分布的改善效果最佳。
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