单选题There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.Aa setting tankBa service tankCa head tankDan expansion joint
单选题
There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.
A
a setting tank
B
a service tank
C
a head tank
D
an expansion joint
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