RR stops

This time we are looking on the crossword clue for: RR stops.
it’s A 8 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: STNS, STAS.

Last seen on: –Wall Street Journal Crossword – Jan 2 2019 – Put a Lid on It!

Random information on the term “STAS”:

A smoke hood is a protective device similar in concept to a gas mask. A translucent airtight bag seals around the head of the wearer while an air filter held in the mouth connects to the outside atmosphere and is used to breathe. Smoke hoods are intended to protect victims of fire from the effects of smoke inhalation.

Although the concept of air filtration masks dates back as far as Pliny the Elder, many early designs suffered from serious flaws, including an inability to adequately filter or provide enough air to the user, or design shortcomings that led to equipment that was either uncomfortable or difficult to don and use.

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The first known modern-design smoke hood was developed by Garrett Morgan. Patented in 1912, the Morgan hood represented a significant improvement in the engineering and operability of smoke hoods or masks. Due partly to race issues in the United States at the time, Morgan, an African American, and his device went largely unrecognized until 1916. During construction of a tunnel under Lake Erie, an explosion trapped a number of sandhogs in the partially completed tunnel and filled the space with toxic fumes. Two separate rescue attempts failed, and the rescue teams themselves ended up in need of rescuing. Morgan, along with his brother and two volunteers, entered wearing Morgan smoke hoods and rescued several men apiece, which prompted others to don Morgan hoods and join the rescue attempt. In the end, Morgan’s smoke hood enabled the rescue of many of the trapped men and allowed Morgan himself to make four trips into the tunnel—a journey that without the hood was not possible even once.

STAS on Wikipedia