Parallels (engineering) — Engineering parallels are rectangular blocks of metal, commonly Instrument metal, stainless steel or Solid iron, that have four or 6 faces floor or lapped into a specific surface area finish. They can be used when machining with a miller, drill or some other… … Wikipedia A shock https://johnathanokylu.blogrenanda.com/27778255/getting-my-air-receiver-tank-to-work