膨胀螺栓与化学螺栓和化学植根螺栓强度虽然较低，但其经济性非常好。
The bearing capacity of expansion bolts is lower than chemical-fixing bolt, but it is economical.
如果某个团队确实碰到麻烦并必须下降，至少可以离开化学螺栓挂片的线路。
If a team does have trouble and needs to descend, it could at least rap off the glue-in bolts.
结果表明，该螺栓化学成分和金相组织未见异常。
The results show that chemical composition and microstructure of the fracture bolt were in normal state.
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