The Salvage Masheen is a relic of the old world that Wastelanders use to craft items with. You can find Salvage Masheens at The Great Fissure Telehub and at The Wastelands telehub.
To use this, wear your HUD, click the machine. You've got 90 seconds to rez your items, and then click "Craft Item". If you successfully craft something you'll be given the new item as well as an entertaining bit of flavor text. If you don't your original items will be returned.
Things you can craft
Major Spoiler
WL: Ammunition Feed
WL: Arrows
WL: Ball Bearings
WL: Basic Belt
WL: Basic frame
WL: Basic Pouch
WL: Blade
WL: Bullets Ammo
WL: Chain fence
WL: Cinder Block
WL: Cloth
WL: Cloth Fistwraps
WL: Crowbill
WL: Double Belt
WL: Double Fur Lined Belt
WL: Double Fur Lined Belt (Recipe Variant)
WL: Double Pouch Belt
WL: Double Pouch Belt (Recipe Variant)
WL: Double Sharktooth Belt
WL: Double Sharktooth Belt (Recipe Variant)
WL: Drum Chair
WL: Drum Sofa
WL: Drum Table
WL: Eagleseye Pistol
WL: Electric Motor
WL: Empty glass bottle
WL: Face Breaker
WL: Flatbread
WL: Flayer
WL: Flour
WL: Fur Lined Belt
WL: Glu
WL: Grit Skrub
WL: Gunpowder
WL: Hunters Rifle
WL: Iron ingot
WL: Kidney Burster
WL: Long Pole
WL: Lumber
WL: Machete
WL: Marauder's Trophy Belt
WL: Mechanical parts
WL: Medkit
WL: Nail Gun
WL: Nails Ammo
WL: Pipe Rifle
WL: Pistol Handle
WL: Piston
WL: Pistons
WL: Pouch Belt
WL: PVC Pipe
WL: Rifle Stock
WL: Ripper Pistol
WL: Roasted Turkey Buzzard Leg
WL: Rope
WL: Scavengers Knife
WL: Scavengers Pistol
WL: Scavengers Rifle
WL: Sharktooth Belt
WL: Sheet metal
WL: Slugs Ammo
WL: Slugthrower
WL: Small Blade
WL: Steel Cable
WL: Steel Ingot
WL: Stitched Fur
WL: Stitched Leather
WL: The Rattlesnake
WL: Tire
WL: Toxin
WL: Trophy Belt
WL: Unstable Concoction
WL: Vicious Clobberin Stick
WL: Weapon Haft
WL: Weapon Sight
WL: Wheel
WL: Wooden Bow Limbs