Parallels (engineering) — Engineering parallels are rectangular blocks of metallic, usually tool metal, stainless steel or Forged iron, which have 4 or six faces ground or lapped to the specific surface area end. They're utilized when machining having a miller, drill or some other… … Wikipedia In this case, the https://air-receiver-tank48259.widblog.com/61286243/how-engineering-inspections-can-save-you-time-stress-and-money