Does the gas tank have its own pressure reducing valve?

At present, manufacturers do not give away matching accessories when buying any brand of cookers. These need to be purchased by yourself. Because these accessories are necessary, without these things, how can gas get into your stove? There is also the sharp pressure method, in which gas is used to decompress. The pressure of the storage tank itself is much higher than that required by the actual furnace. General material stores should have them. Try to get the best. Because this thing is nothing but gas. If something goes wrong, it's no small matter. I really don't trust you to go to a bigger building materials supermarket, there should be ~!