题目内容
使钢材表面外观洁净的喷射除锈或抛射除锈。非常彻底地除掉金属表面上的油脂、氧化皮、锈蚀产物等一切杂物，表面无任何可见残留物，呈现均匀的金属光泽，并有一定的粗糙度,此除锈质量等级为( )。
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建筑设备安装工程管道现场除锈通常采用（ ）。
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