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John H. Balsley. John H. Balsley (May 29, 1823 – March 12, 1895) was a master carpenter and inventor, inventing a practical folding wooden stepladder and receiving the first U.S. patent issued for a safety stepladder in the year. He was born in Connellsville, Fayette County, Pennsylvania to George H. and Sarah (Shallenberger) Balsley.
Step ladders have flat steps and a hinged back. Swim ladder, a ladder used by swimmers to get out of the water, often on boats. Telescoping ladder, commonly used to refer to a hybrid between a step ladder and an extension ladder with 360-degree hinges; has three parts and can be taken apart to form two step ladders; e.g. Little Giant.
Three Steps. North Face of Mount Everest. "1st", "2nd", and "3rd" indicate the Three Steps. The Three Steps are three prominent rocky steps on the northeast ridge of Mount Everest. They are located at altitudes of 8,564 metres (28,097 ft), 8,610 metres (28,250 ft), and 8,710 metres (28,580 ft). The Second Step is especially significant both ...
Continuous fever is a type or pattern of fever in which temperature does not touch the baseline and remains above normal throughout the day. The variation between maximum and minimum temperature in 24 hours is less than 1°C (1.5°F). [1] It usually occurs due to some infectious disease. Diagnosis of continuous fever is usually based on the ...
Pain ladder. "Pain ladder", or analgesic ladder, was created by the World Health Organization (WHO) as a guideline for the use of drugs in the management of pain. Originally published in 1986 for the management of cancer pain, it is now widely used by medical professionals for the management of all types of pain.
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