Tighten the bolts manually if you cannot do it with the specified tool.如果不能使用指定的工具手动紧 固螺栓。
A.Tighten the bolts manually until you can do it with the specified tool. B.Tighten the bolts manually if it is not feasible to doit with the specified tool. C.In case that you cannot do it with the specified tool in case, tighten the bolts manually.正确答案B
