The lowest point between two waves is called().
A、though
B、tough
C、through
D、trough
A、though
B、tough
C、through
D、trough
A、at the lowest point B、near the batteries C、at the highest point D、only when charging is in progress
A、the highest point in the system B、the lowest point in the system C、near the floor D、plate level or near the tank top level
A、specific gravity or relative density B、open flash point and closed flash point values C、higher calorific and lower calorific values D、cloud point and pour point values
A、above the floor plates of the bilges B、above the carburetor level C、at the lowest point of the bilge areas D、at no particular level