Arb and Roll bar

Arb noun - Someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential).

Roll bar and arb are semantically related in protective frame for car topic. In some cases you can use "Roll bar" instead a noun "Arb".

Arb and roll bar are semantically related in protective frame for car topic. You can use "Arb" instead a noun phrase "Roll bar".