Ключевые слова: and connections, and the construction of pieces, anyone, bolts, carbon, design, equipment, fasteners, features, flanged, gas, gray, hardware, industry, iron, joint, level, macros, manufacturing, metal, mining, nuts, part of the work, peace, pipe, pipes, project, repair, screw, security, shiny, shop, silver, solid, spiral, stainless steel, steel, technician, technology, thread, threaded, tools, trade, tube, valves,