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Humans can smell chlorine gas at ranges from 0.1–0.3 ppm. According to a review from 2010: "At 1–3 ppm, there is mild mucous membrane irritation that can usually be tolerated for about an hour. At 5–15 ppm, there is moderate mucous membrane irritation. At 30 ppm and beyond, there is immediate chest pain, shortness of breath, and cough.
Shock chlorination is a process used in many swimming pools, water wells, springs, and other water sources to reduce the bacterial and algal residue in the water. Shock chlorination is performed by mixing a large amount of sodium hypochlorite , which can be in the form of a powder or a liquid such as chlorine bleach , into the water.
A bullet might travel a mile (1.6 km) in air, but travel no more than a few feet (about a meter) in water. Expanding hunting or defensive ammunition, such as that using hollow point bullets, will penetrate even less, as the water is dense enough to cause the bullet to expand. By firing while in contact with the target, a powerhead does not ...
A rupture disc (burst) Pressure-effect acting at a rupture disc A rupture disc, also known as a pressure safety disc, burst disc, bursting disc, or burst diaphragm, is a non-reclosing pressure relief safety device that, in most uses, protects a pressure vessel, equipment or system from overpressurization or potentially damaging vacuum conditions.
The tank recovery vehicle M74 (M74) [1] was an engineer vehicle used by the U.S. Army in the 1950s. It was designed to cope with the heavier weights of the M26 Pershing and M47 Patton . It could also be suitable for light dozing, since it had a hydraulic, front-mounted spade.
Stops water hammering. Placed immediately after the discharge of a pump that is started fast into a pipe full of a long column of liquid. Reduces start up surge pressure. Placed immediately after a pump, which when caused to stop suddenly, enables a vacuum to form, which pulls the flow back towards the pump. Prevents an implosion bang.
The DCL comes as a replacement for the AMX-30 D in the role of a recovery and repair tank for battle tanks over 50 tonnes. Nexter designates it DNG ( Dépanneur Nouvelle Génération , "next generation repair"); the French Army uses the term DCL ( Dépanneur du Char Leclerc , "Leclerc tank repair").
A Sd.Kfz. 9/1 hoisting a Maybach HL 120 TRM engine into a Panzer III in the Soviet Union, January 1943. A new upper body was used for the Sd.Kfz. 9/1 which mounted a 6 t (5.9 long tons; 6.6 short tons) capacity crane in lieu of the crew's bench seat and the cargo compartment. It was issued to tank maintenance units beginning in September 1941.