Yep others nailed it. M109 self propelled 155MM artillery gun. Came out in the 60's and is still in the inventory today as the M109A7.
As far as guided munitions? Old school. The laser guided munitions "Copperhead" were in the inventory prior to Desert Storm. The US Army started deploying them in the 1980's. Kind like the laser guided smart bomb. Not new. Some were actually used in the late stages of Vietnam. But then most folks don't know that the heat seeking air to air rocket was adopted about 1959. Just a lot of stuff about weapons and munitions are classified until we are reasonably sure that countries like Russia and China have developed similar stuff or until we have to use it in combat.
Go and look up the history of the proximity fuse used on anti aircraft ammo. Developed in WWII and so secret that it was not allowed to be used where an un-exploded round could fall to the ground and be recovered by the Germans or Japanese.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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