链传动的失效形式有哪几种?
参考答案:
链传动的失效形式主要有如下几种:链板疲劳破坏、链条铰链的磨损、链条铰链的胶合和链条过载拉断。
--- I’ve studied watching birds as one of my interests. Could I make some suggestions?
---_________ .
A.You will make it
B.It doesn’t matter
C.Go right ahead
D.Take it easy
男性,57岁,右下腹部间歇性阵发性痛伴肠鸣,腹胀,腹泻,稀便3个月,5年前有阑尾切除史,查:右下腹扪及3×4厘米结节状硬块,不易推动,Hb7g/dl,WBC10×109/L,N78%,尿(-),最可能的诊断是()
A.回盲部结核
B.炎性肿块
C.回盲部血吸虫肉芽肿
D.阑尾周围脓肿
E.盲肠癌