Secret of assembling Die-cast aluminum LED Screen Display

If you have ever tried to assemble a Die-cast aluminum LED Screen Display.
You must have found that it is not easy to flatten a cabinet.

If the module and the module are uneven, the lamp beads cannot be aligned, and it is conceivable that the picture will not be fine.

So how can we make the LED Module extrimly flatten, we have our own secret wappon.

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