In the shop where I apprenticed back in the mid '60s these wood mats were called duckboards, and they were in front of every machine in the shop, and were made by the carpenter shop on site; generally, they had narrower slats than toe one pictured, and chips easily fell through, and regularly, the sweepers came by, took the mats up and swept all the chips away (and gave us a bit of a break in the process). In my own shop, I used duck boards in front of the principal lathes where there was a lot of standing, and odd mats of rubber or old conveyor belting on less used machines; my motto, whatever works or is cheap, or somebody gives me is fine.