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Autoclave tape is an adhesive tape used in autoclaving (heating under high pressure with steam to sterilise) to indicate whether a specific temperature has been reached. [1] Autoclave tape works by changing color after exposure to temperatures commonly used in sterilization processes, typically 121°C in a steam autoclave.
Autoclave tape is only a marker that steam and heat have activated the dye. The marker on the tape does not indicate complete sterility. A more difficult challenge device, named the Bowie-Dick device after its inventors, is also used to verify a full cycle. This contains a full sheet of chemical indicator placed in the center of a stack of paper.
Larry and Pearl Winters designed High-Bid and it was published by 3M in 1963. It sold well, and 3M came out with new editions in 1964, 1965, 1967, 1968, 1970 and 1975. [3] Avalon Hill then acquired the license for the game, and produced a new edition titled The Collector in 1977, and an edition with the title Auction in 1989. [3]
The games were produced by 3M from 1962 to 1975, under the complete company name, The Minnesota Mining & Manufacturing Company. By the mid-1970s, gaming trends had shifted to pen-and-paper role playing games and the 3M game division was suffering losses. In 1976, the entire line was sold to Avalon Hill, which produced a competing line of ...
PTFE tape used for different sized fittings PTFE tape for natural gas. There are two US standards for determining the quality of any thread seal tape. MIL-T-27730A (an obsolete military specification still commonly used in industry in the US) requires a minimum thickness of 3.5 mils and a minimum PTFE purity of 99%. [3]
The Gila Bend Steam Locomotive Water Stop was built in 1900 and is located in Gila Bend, Arizona Remnants of Turkish railway station in Nitzana, Israel. Left: Water stop. Right: Wall of the Stationmaster's office. A water stop or water station on a railroad is a place where steam trains stop to replenish water. The stopping of the train itself ...
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