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2. Hardness comparison - Wikipedia

   en.wikipedia.org/wiki/Hardness_comparison

   ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

3. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [15] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size. The reduction length is usually equal to the ...

4. Rockwell hardness test - Wikipedia

   en.wikipedia.org/wiki/Rockwell_hardness_test

   A Rockwell hardness tester. The Rockwell hardness test is a hardness test based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]

5. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. RM-38 - Wikipedia

   en.wikipedia.org/wiki/RM-38

   Mine 0-822A for a 50-mm PM-38 mortar. The RM-38 or 50-RM 38 (50-mm company mortar model 1938) was based on the British Stokes mortar. It was further developed as the RM-39 and RM40. [1] The Red Army of the USSR divided mortars into company (RM Rotnyy Minomet) battalion (BM Batalonnyy Minomet) and regimental (PM Polkovoy Minomet) mortars ...

7. British standard ordnance weights and measurements - Wikipedia

   en.wikipedia.org/wiki/British_standard_ordnance...

   40 mm 1.575 Ordnance QF 3-pounder Vickers: Naval gun 47 mm 1.85 inch Ordnance QF 6-pounder: Anti-tank gun 57 mm 2.244 inch Ordnance BL 10-pounder Mountain gun: Mountain gun 69.8 mm 2.75 inch 12-pounder (multiple types) Light field gun 76.2 mm 3 inch Ordnance QF 13-pounder: Light field gun 76.2 mm 3 inch 15- pounder (multiple types) Field gun 76 ...

8. 7.63×25mm Mauser - Wikipedia

   en.wikipedia.org/wiki/7.63×25mm_Mauser

   Firearms chambered for the 7.63mm Mauser cartridge include the pistol for which it was designed, the Mauser C96 in all variants and copies, the Astra Model 900 and variants, the Schwarzlose Model 1898, the 1911-pattern Star models A and M, [2] and a handful of pre-World War II submachine guns such as the Swiss Bergmann M/20 exported to China ...

9. 5-inch/54-caliber Mark 45 gun - Wikipedia

   en.wikipedia.org/wiki/5-inch/54-caliber_Mark_45_gun

   The 5-inch (127 mm)/54-caliber (Mk 45) lightweight gun is a U.S. naval artillery gun mount consisting of a 5 in (127 mm) L54 Mark 19 gun on the Mark 45 mount. [1] It was designed and built by United Defense , a company later acquired by BAE Systems Land & Armaments , which continued manufacture.