concrete texture background with peculiar cavities and hollow parts painted in black, white and gray colors

abandoned background black blades box cavities chair colors concrete connection design electric electricity engine exhaust factory forgotten fresh generates gray grounded grounding hollow hood induces induction industrial industry locksmith locksmiths lubrication magnetic metal motor old painted part parts past peculiar phase rack ribs roof rotates rotation rotor rusty selfinduction shaft soviet stand stands stationary stator stool system terminal terminals texture voltage white winding wires worker working works