Here's what you can do.
1. You need to get to the Western storage garages at the top of the entrance area. You will have to pass a camera but this should be doable with low stealth.
2. You will be in a room with a gate. Find the computer to open the gate. Two strongmen will appear (or maybe you need to make them appear with the computer) and they will kill the spiders that emerge. Remain stealthed and far away.
3. The next room is large enough that, with some patience, you should be able to reach the west control room (top of the room, up the stairs) while avoiding the strongmen. Open the storage garages. If you want, you can use the surveillance to watch for one of strongmen to walk into a garage, and the close the door on it. One of the garages has 2 TnT and a few EMP grenades. You need the 2 TnT and at least one EMP grenade.
4. Return to the entrance area while stealthed. You will immediately be in line of sight of the camera. Take a step back into the red exit area to get out of line of sight. You can still place the TnT under the camera from here. It will explode, killing the camera, but not hurting you much. This will also attract all of the automatons to your area. So, hurry, and return to the storage garages.
5. From the storage garages, head north (right), and you will find an exit that leads to an otherwise inaccessible office in entrance area. The enemies should be a screen-and-a-half away but remain stealthed. Throw an EMP grenade in the office and as close to the enemies as possible. They will hear and converge to the office.
6. Hurry. Run back to the storage garages and then the entrance area. The camera is dead and the enemies are converging to the office. Some enemies may have stayed behind, so if your stealth is low, you may need some luck. You will see a wall that can broken near the room where you put your weapons in storage. Use your last TnT to blow up the wall, rush into the room it exposes, and slam the door before the enemies arrive.
7. You did it. This room has your gear. Now you just need to fight off a dozen or so angry robots.