单项选择题
A.Engine room B.Bridge C.Deck D.Compass
Cement wash is a mixture of cement powder and （）.A.fres...
单项选择题Cement wash is a mixture of cement powder and （）.
A.fresh water B.steel C.paint D.wood
The principle protective coating is （）.A. cement washB....
单项选择题The principle protective coating is （）.
A. cement wash B. paint C. bitumen D. undercoat
（）are the three different coatings which can protect me...
单项选择题（）are the three different coatings which can protect metal from corrosion.
A. Cement wash, bitumen and paint B. Metal primers, undercoats and topcoats C. Varnishes, heat-resistant paints and anti-fouling paints D. Cement wash, primer and undercoat
