当室外钢结构需防火保护时，应采用专用的露天用防火涂料，并以防锈底漆打底。
When the outdoor steel structure fire protection, should use special open with fire retardant coating, and with anti rust primer.
当室外钢结构需防火保护时，应采用专用的露天用防火涂料，并以防锈底漆打底。
When the outdoor steel structure fire protection, should use special open with fire retardant coating, and with anti rust primer.
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