In a basement, the top and bottom plates are often different lengths.
地下室的顶板和底板的长度往往不同。
Lay out partition walls by snapping chalk lines to mark both sides of the bottom plates.
在主夹板的两边分别画上明显的线以确定隔断墙的位置。
The external corrosion mainly covers the corrosion on tank top head, tank bottom plates and wall plates.
外腐蚀主要包括罐顶、罐底板和外壁的腐蚀。
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