单项选择题
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
The basic types of paint used on a ship are （）.A. cemen...
单项选择题The basic types of paint used on a ship are （）.
A. cement wash, bitumen and paint B. primer, undercoats and top coats C. topside paint, boot-topping paint and bottom paint D. primer, cement wash and paint
