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.
Mexicans (Spanish: Mexicanos) are the people of Mexico, a multiethnic country in North America, and those who identify with the Mexican cultural and/or national identity.fro-Mexicans are an ethnic group that predominate in certain areas of Mexico. Such as the Costa Chica of Oaxaca and the Costa Chica of Guerrero, Veracruz (e.g. Yanga) and in some towns in northern Mexico.