Drain channel 

There are ribs and recess on each side of the channel, so they can be snap into each other. Pls use sealant filling the connecting area to avoid water leak.

And this is the stainless steel slot drain cover. There are 2 slot in the middle, and this kind of cover is customized.

During the installation, pls pour concrete on the side to fix the channel and hold the weight of pedestrian and cars. After installation, you can only see the straight and nice slot for rainwater drainage.