单项选择题
A.round out B.round file C.reamer D.hole driller
Reheating a hardening component to a temperature lower ...
单项选择题Reheating a hardening component to a temperature lower than the hardening temperature and then cooling it is known as （）
A.low temperature hardening B.case hardening C.annealing D.tempering
Which of the listed effects represents the purpose of h...
单项选择题Which of the listed effects represents the purpose of heat treating steel?（）
A.Develop ductility B.Improve machining qualities C.Relieves stresses D.All of the above
Which of the following nondestructive testing methods c...
单项选择题Which of the following nondestructive testing methods can be used to detect a suspected subsurface defect in a tail-shaft liner?（）
A.Dye penetrant B.Magnetic particle C.Ultrasonic D.All of the above
