original machined marks
1Lee-Enfield — This article is about the early twentieth century British rifle. For other uses, see Enfield rifle (disambiguation). Lee Enfield Short Magazine Lee Enfield No. 1 Mk. III Type …
2Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
3Spring (device) — Helical or coil springs designed for tension Compression sp …
4steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
5Comparison microscope — A B Two identical microscopes C C Specimens to compare D Comparison eyepiece (optical bridge) A comparison microscope is a device used to analyze side by side specimens. It consists of two microscopes connected by an optical bridge, which results …
6Enigma machine — Military Enigma machine …
7Rolls-Royce Merlin — Merlin The Rolls Royce Merlin …
8Die casting — An engine block with aluminium and magnesium die castings. Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies… …
9aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the …
10Mosin–Nagant — Mosin Nagant Mosin Nagant series of rifles Type Bolt action rifle Place of origin …
