阿摩線上測驗
6. Which possible reason will not make centrifugal pumps to failure to build up pressure?
(A) The water has high temperature
(B) There is air in the water
(C) The speed of motor is too slow
(D) The impeller may be damaged or wearing rings worn, or some other mechanical defect
答案：登入後查看
統計： A(667), B(196), C(166), D(156), E(0) #2333264
統計： A(667), B(196), C(166), D(156), E(0) #2333264
