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單項選擇題

The principle protective coating is （）.

A. cement wash
B. paint
C. bitumen
D. undercoat

單項選擇題

（）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

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Cement wash is a mixture of cement powder and （）.

你可能感興趣的試題

The principle protective coating is （）.

（）are the three different coatings which can protect metal from corrosion.

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