求翻译：采用机械抛丸除锈。抛射除锈可以提高钢材的疲劳强度和抗腐能力。对钢材表面硬度也有不同程度的提高，有利于漆膜的附和不需增加外加的涂层厚度，施工环境相对湿度不应大于85％是什么意思？

The mechanical shot blasting. The projectile rust can improve the fatigue strength and corrosion of the steel. On the steel surface hardness improved to varying degrees, in favor of the film echoed without adding additional coating thickness, construction Relative humidity should not exceed 85%

With mechanical blasting rust. Throw the rust you can increase the steel fatigue strength and resistance to rot. surface hardness of steel also has a different level of awareness of the paint film, and not require additional plus of the coating thickness, construction relative humidity should not be

Uses the machinery to throw the pill to eliminate the rust.The ejection eliminates the rust to be possible to enhance the steel products the fatigue strength and the anti-spoiled ability.Also has the varying degree enhancement to the steel products skin hardness, is advantageous echoes in the varnis

Used machinery shot-blasting. Projectile rust and rot resistance improves the fatigue strength of steels. On surface hardness of steel have different degrees of increased, echoing in favour of film coating thickness without additional admixtures, construction environmental relative humidity should n

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