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.
In Central Mexico, north of the Yucatan, yucatÃ¡n Another mesoamerican civilization. Thrived The Aztec empire was based in The valley Of, mexico a, wide high elevation valley in the mountains Of Central. Mexico in this wide, valley The aztecs were unified as one, people who called themselves The. mexica