Two hexagon socket head screws of carburetor joint slip. How do we get them out? Help!

Is the hexagon round or the screw slipped? If the screw slips, you can enlarge the screw hole. If the hexagon slips, you can use the word "edging" to knock hard, knock out the notch groove, and then use the word "front end" (no handle) to knock and push it to the thread withdrawal side. If you have a self-tapping screwdriver, you can tap directly with your head in the wire withdrawal file and get off.