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This is an incomplete list of DIN standards.. The "STATUS" column gives the latest known status of the standard.. If a standard has been withdrawn and no replacement specification is listed, either the specification was withdrawn without replacement or a replacement specification could not be identified.
SAE Type 630 stainless steel (more commonly known as 17-4 PH, or simply 17-4; also known as UNS S17400) is a grade of martensitic precipitation hardened stainless steel. It contains approximately 15–17.5% chromium and 3–5% nickel, as well as 3–5% copper. [1] The name comes from the chemical makeup which is approximately 17% chromium and 4 ...
A hinged arch bridge is one with hinges incorporated into its structure to allow movement. In structural engineering, a hinge is essentially a "cut in the structure" that can withstand compressive forces. In a steel arch the hinge allows free rotation, [2] somewhat resembling a common hinge. The most common hinged arch bridge varieties are the ...
Popular as a "grass hut" or beach fale in village tourism, many are raised about a meter off the ground on stilts, sometimes with an iron roof. In a village, families build a faleo'o beside the main house or by the sea for resting during the heat of the day or as an extra sleeping space at night if there are guests.
1915: Harry Brearley invents a process to create Martensitic stainless steel, initially labelled Rustless Steel, later marketed as Staybrite, and AISI Type 420. [461] 1915: The first operational military tanks are designed in Great Britain and France. They are used in battle from 1916 and 1917 respectively.
The common names for these grasses include marram grass, bent grass, and beachgrass. [2] These grasses are found almost exclusively on the first line of coastal dunes . Their extensive systems of creeping underground stems or rhizomes allow them to thrive under conditions of shifting sands and high winds, and to help stabilize and prevent ...