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.
What the would be Mexica do is a version of pan Indianism, an inaccurate view of all Indians as one generic group. Where the old westerns (and some non-Natives today) see all Indians as one vague Plains Indian culture, the Mexica see all Mexicans as generic Aztecs.