D Type Cartridge Shaped Cartridge, Black Paint, Nickel-Type, Nickel-Type Spring-Rod Manufacturer Direct Sale
D type bomb manufacturer.

The company mainly produces: tail bolt, high strength tail, conventional spike, small cold injury mechanism of spike, spike, spike, screw spike, by hand hook head bolt, wood screw, type D play and so on
http://www.railwayfishplate.com/rail-metal-clips-fasteners/d-type-rail-metal-clips-fasteners/d-type-cartridge-shaped-cartridge-black-paint.html