车体落成后，支架及抑制盘触头支架组成用螺栓安装在支架托板上，螺栓须三点焊固。

As a last resort，a tourniquet can be used to（）.

A.hold a victim in a stretcher

B.stop uncontrolled bleeding

C.hold a large bandage in place

D.restrain a delirious victim