A.low temperature hardening
B.case hardening
C.annealing
D.tempering
您可能感興趣的試卷
你可能感興趣的試題
A.Develop ductility
B.Improve machining qualities
C.Relieves stresses
D.All of the above
A.Dye penetrant
B.Magnetic particle
C.Ultrasonic
D.All of the above
A.and quench it in oil
B.cherry red and quench in water
C.and let it cool slowly in the air
D.and carbonize
A.center drill
B.finish drill
C.broach
D.reamer
A.Mill
B.Round
C.Square
D.Triangular
最新試題
Diesel engine air start system check valves are opened by （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The shipboard oil pollution emergency plan will be invalid after （）
The treatment of the fuel oils involves storage, heating, filtering and（）
Under MARPOL Code the ship to which it applies has to carry （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
The condensers located in various stages of a flash evaporator are cooled by（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The ISPS Code consists of a mandatory section-Part A, which shows（）