Clapboard was painted however pure white, for the sake of the interval on the vision is being caused between the wall paper with unique design and floor tile.
护墙板却被漆成了纯白色，为的是在设计独特的墙纸和地砖之间造成视觉上的间隔。
The paper introduced pipe internal welding machine's composition, necessary equipment and unique advantage in large diameter thick wall pipe construction.
介绍管道内焊机的结构、配套设备及在大口径厚壁管道施工中的独到优点。
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