Steel and elastomer assembly that has a central through-passage equal to or greater in diameter than the riser bore and that may be positioned in the riser string to reduce local bending stresses.
The Mazatec people are an indigenous people who inhabit an area known as the Sierra Mazateca in the state of Oaxaca in southern Mexico, as well as some communities in the adjacent states of Puebla and Veracruz.
Sponsored Topics. Manteca is a city in San Joaquin County, California, USA. As of the 2010 census, the city's population was 67,096. Manteca is a city in the Central Valley of California, 76 miles east of San Francisco. It was founded in 1861 by Joshua Cowell.