底板是以槽钢焊接成框架，钢板为面板的平板结构，其尺寸与模框相对应。
Channel bottom is welded into the frame, steel structure for the flat panel, and its size corresponds with the mold box.
底板是以槽钢焊接成框架，钢板为面板的平板结构，其尺寸与模框相对应。
Channel bottom is welded into the frame, steel structure for the flat panel, and its size corresponds with the mold box.
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