The sunken guide-slot forms ribreinforcement at the backside of the base-plate and the base-plate is hard to deform.
下凹的导槽在底板背面形成加强筋，底板 不易变形；
2
Surface is smooth and flat on the surface of tray surface, it can meet transportation of all goods, ribreinforcement is installed on the lower surface.
托盘板上表面平整光滑，可满足各种货物的运输，下表面设有加强筋。
3
The invention relates to a stone plate, which comprises the following parts: thin stone plate, strip groove on the back of thin stone plate, ribreinforcement inserted in the strip groove.